diff --git a/ci/scripts/e2e-elasticsearch-sink-test.sh b/ci/scripts/e2e-elasticsearch-sink-test.sh
index 29913a7509db8..029cddbf91a90 100644
--- a/ci/scripts/e2e-elasticsearch-sink-test.sh
+++ b/ci/scripts/e2e-elasticsearch-sink-test.sh
@@ -13,7 +13,9 @@ sleep 5
 
 echo "--- checking elasticsearch sink result"
 curl -XGET -u elastic:risingwave "http://elasticsearch:9200/test/_search" -H 'Content-Type: application/json' -d'{"query":{"match_all":{}}}' > ./e2e_test/sink/elasticsearch/elasticsearch_sink.tmp.result
+curl -XGET -u elastic:risingwave "http://elasticsearch:9200/test1/_search" -H 'Content-Type: application/json' -d'{"query":{"match_all":{}}}' > ./e2e_test/sink/elasticsearch/elasticsearch_with_pk_sink.tmp.result
 python3 e2e_test/sink/elasticsearch/elasticsearch.py e2e_test/sink/elasticsearch/elasticsearch_sink.result e2e_test/sink/elasticsearch/elasticsearch_sink.tmp.result
+python3 e2e_test/sink/elasticsearch/elasticsearch.py e2e_test/sink/elasticsearch/elasticsearch_with_pk_sink.result e2e_test/sink/elasticsearch/elasticsearch_with_pk_sink.tmp.result
 if [ $? -ne 0 ]; then
   echo "The output is not as expected."
   exit 1
diff --git a/e2e_test/sink/elasticsearch/elasticsearch_sink.result b/e2e_test/sink/elasticsearch/elasticsearch_sink.result
index 6c861feecca76..7f832258c9595 100644
--- a/e2e_test/sink/elasticsearch/elasticsearch_sink.result
+++ b/e2e_test/sink/elasticsearch/elasticsearch_sink.result
@@ -1 +1 @@
-{"took":6,"timed_out":false,"_shards":{"total":1,"successful":1,"skipped":0,"failed":0},"hits":{"total":{"value":6,"relation":"eq"},"max_score":1.0,"hits":[{"_index":"test","_type":"doc","_id":"3","_score":1.0,"_source":{"d":"1970-01-01","t":"00:00:00.123","tz":"1970-01-01T00:00:00.123Z","v1":3,"v2":2,"v3":"3-2","ts":"1970-01-01 00:00:00.123"}},{"_index":"test","_type":"doc","_id":"5","_score":1.0,"_source":{"d":"1970-01-01","t":"20:00:00.000","tz":"1970-01-01T00:00:00.000Z","v1":5,"v2":2,"v3":"5-2","ts":"1970-01-01 00:00:00.000"}},{"_index":"test","_type":"doc","_id":"8","_score":1.0,"_source":{"d":"1970-01-01","t":"20:00:00.000","tz":"1970-01-01T00:00:00.000Z","v1":8,"v2":2,"v3":"8-2","ts":"1970-01-01 00:00:00.000"}},{"_index":"test","_type":"doc","_id":"13","_score":1.0,"_source":{"d":"1970-01-01","t":"20:00:00.123","tz":"1970-01-01T20:00:00.123Z","v1":13,"v2":2,"v3":"13-2","ts":"1970-01-01 20:00:00.123"}},{"_index":"test","_type":"doc","_id":"1","_score":1.0,"_source":{"d":"2000-01-01","t":"00:00:00.123","tz":"2000-01-01T00:00:00.123Z","v1":1,"v2":50,"v3":"1-50","ts":"2000-01-01 00:00:00.123"}},{"_index":"test","_type":"doc","_id":"2","_score":1.0,"_source":{"d":"1970-01-01","t":"00:00:00.000","tz":"1970-01-01T00:00:00.000Z","v1":2,"v2":2,"v3":"2-2","ts":"1970-01-01 00:00:00.000"}}]}}
+{"took":6,"timed_out":false,"_shards":{"total":1,"successful":1,"skipped":0,"failed":0},"hits":{"total":{"value":6,"relation":"eq"},"max_score":1.0,"hits":[{"_index":"test","_type":"_doc","_id":"3","_score":1.0,"_source":{"d":"1970-01-01","t":"00:00:00.123","tz":"1970-01-01T00:00:00.123Z","v1":3,"v2":2,"v3":"3-2","ts":"1970-01-01 00:00:00.123"}},{"_index":"test","_type":"_doc","_id":"5","_score":1.0,"_source":{"d":"1970-01-01","t":"20:00:00.000","tz":"1970-01-01T00:00:00.000Z","v1":5,"v2":2,"v3":"5-2","ts":"1970-01-01 00:00:00.000"}},{"_index":"test","_type":"_doc","_id":"8","_score":1.0,"_source":{"d":"1970-01-01","t":"20:00:00.000","tz":"1970-01-01T00:00:00.000Z","v1":8,"v2":2,"v3":"8-2","ts":"1970-01-01 00:00:00.000"}},{"_index":"test","_type":"_doc","_id":"13","_score":1.0,"_source":{"d":"1970-01-01","t":"20:00:00.123","tz":"1970-01-01T20:00:00.123Z","v1":13,"v2":2,"v3":"13-2","ts":"1970-01-01 20:00:00.123"}},{"_index":"test","_type":"_doc","_id":"1","_score":1.0,"_source":{"d":"2000-01-01","t":"00:00:00.123","tz":"2000-01-01T00:00:00.123Z","v1":1,"v2":50,"v3":"1-50","ts":"2000-01-01 00:00:00.123"}},{"_index":"test","_type":"_doc","_id":"2","_score":1.0,"_source":{"d":"1970-01-01","t":"00:00:00.000","tz":"1970-01-01T00:00:00.000Z","v1":2,"v2":2,"v3":"2-2","ts":"1970-01-01 00:00:00.000"}}]}}
diff --git a/e2e_test/sink/elasticsearch/elasticsearch_sink.slt b/e2e_test/sink/elasticsearch/elasticsearch_sink.slt
index fd496283e5f1e..049d111713d6f 100644
--- a/e2e_test/sink/elasticsearch/elasticsearch_sink.slt
+++ b/e2e_test/sink/elasticsearch/elasticsearch_sink.slt
@@ -18,6 +18,17 @@ CREATE SINK s7 from t7 WITH (
     password = 'risingwave'
 );
 
+statement ok
+CREATE SINK s8 from t7 WITH (
+    connector = 'elasticsearch',
+    index = 'test1',
+    primary_key = 'v1,v3',
+    url = 'http://elasticsearch:9200',
+    username = 'elastic',
+    password = 'risingwave',
+    delimiter = '_'
+);
+
 statement ok
 INSERT INTO t7 VALUES
   (1, 2, '1-2', '1970-01-01', '00:00:00', '1970-01-01 00:00:00', '1970-01-01 00:00:00Z'),
@@ -39,5 +50,8 @@ FLUSH;
 statement ok
 DROP SINK s7;
 
+statement ok
+DROP SINK s8;
+
 statement ok
 DROP TABLE t7;
diff --git a/e2e_test/sink/elasticsearch/elasticsearch_with_pk_sink.result b/e2e_test/sink/elasticsearch/elasticsearch_with_pk_sink.result
new file mode 100644
index 0000000000000..12ac1c8370376
--- /dev/null
+++ b/e2e_test/sink/elasticsearch/elasticsearch_with_pk_sink.result
@@ -0,0 +1 @@
+{"took":6,"timed_out":false,"_shards":{"total":1,"successful":1,"skipped":0,"failed":0},"hits":{"total":{"value":6,"relation":"eq"},"max_score":1.0,"hits":[{"_index":"test1","_type":"_doc","_id":"3_3-2","_score":1.0,"_source":{"d":"1970-01-01","t":"00:00:00.123","tz":"1970-01-01T00:00:00.123Z","v1":3,"v2":2,"v3":"3-2","ts":"1970-01-01 00:00:00.123"}},{"_index":"test1","_type":"_doc","_id":"5_5-2","_score":1.0,"_source":{"d":"1970-01-01","t":"20:00:00.000","tz":"1970-01-01T00:00:00.000Z","v1":5,"v2":2,"v3":"5-2","ts":"1970-01-01 00:00:00.000"}},{"_index":"test1","_type":"_doc","_id":"8_8-2","_score":1.0,"_source":{"d":"1970-01-01","t":"20:00:00.000","tz":"1970-01-01T00:00:00.000Z","v1":8,"v2":2,"v3":"8-2","ts":"1970-01-01 00:00:00.000"}},{"_index":"test1","_type":"_doc","_id":"13_13-2","_score":1.0,"_source":{"d":"1970-01-01","t":"20:00:00.123","tz":"1970-01-01T20:00:00.123Z","v1":13,"v2":2,"v3":"13-2","ts":"1970-01-01 20:00:00.123"}},{"_index":"test1","_type":"_doc","_id":"1_1-50","_score":1.0,"_source":{"d":"2000-01-01","t":"00:00:00.123","tz":"2000-01-01T00:00:00.123Z","v1":1,"v2":50,"v3":"1-50","ts":"2000-01-01 00:00:00.123"}},{"_index":"test1","_type":"_doc","_id":"2_2-2","_score":1.0,"_source":{"d":"1970-01-01","t":"00:00:00.000","tz":"1970-01-01T00:00:00.000Z","v1":2,"v2":2,"v3":"2-2","ts":"1970-01-01 00:00:00.000"}}]}}
diff --git a/java/connector-node/risingwave-sink-es-7/src/main/java/com/risingwave/connector/EsSink.java b/java/connector-node/risingwave-sink-es-7/src/main/java/com/risingwave/connector/EsSink.java
index 3e69fa184baea..25a1c60f34d80 100644
--- a/java/connector-node/risingwave-sink-es-7/src/main/java/com/risingwave/connector/EsSink.java
+++ b/java/connector-node/risingwave-sink-es-7/src/main/java/com/risingwave/connector/EsSink.java
@@ -388,7 +388,7 @@ private String buildId(SinkRow row) {
         } else {
             List<String> keys =
                     primaryKeyIndexes.stream()
-                            .map(index -> row.get(primaryKeyIndexes.get(index)).toString())
+                            .map(index -> row.get(index).toString())
                             .collect(Collectors.toList());
             id = String.join(config.getDelimiter(), keys);
         }
@@ -400,14 +400,14 @@ private void processUpsert(SinkRow row) throws JsonMappingException, JsonProcess
         final String key = buildId(row);
 
         UpdateRequest updateRequest =
-                new UpdateRequest(config.getIndex(), "doc", key).doc(doc).upsert(doc);
+                new UpdateRequest(config.getIndex(), "_doc", key).doc(doc).upsert(doc);
         this.requestTracker.addWriteTask();
         bulkProcessor.add(updateRequest);
     }
 
     private void processDelete(SinkRow row) {
         final String key = buildId(row);
-        DeleteRequest deleteRequest = new DeleteRequest(config.getIndex(), "doc", key);
+        DeleteRequest deleteRequest = new DeleteRequest(config.getIndex(), "_doc", key);
         this.requestTracker.addWriteTask();
         bulkProcessor.add(deleteRequest);
     }