diff --git a/CHANGES.md b/CHANGES.md
index 80b993a..a4a9bb3 100644
--- a/CHANGES.md
+++ b/CHANGES.md
@@ -17,6 +17,8 @@
   - @melpon
 - [CHANGE] Ubuntu 20.04 のビルドを削除
   - @melpon
+- [CHANGE] multistream のオプションを削除
+  - @torikizi
 - [UPDATE] Sora C++ SDK を `2024.8.0` に上げる
   - それに伴って以下のライブラリのバージョンも上げる
   - libwebrtc のバージョンを `m128.6613.2.0` に上げる
diff --git a/README.md b/README.md
index 6118d11..b3e5dd1 100644
--- a/README.md
+++ b/README.md
@@ -119,8 +119,6 @@ Options:
                               Video bit rate (default: none)
   --sora-audio-bit-rate INT:INT in [0 - 510]
                               Audio bit rate (default: none)
-  --sora-multistream BOOLEAN:value in {false->0,true->1} OR {0,1}
-                              Use multistream (default: false)
   --sora-simulcast BOOLEAN:value in {false->0,true->1} OR {0,1}
                               Use simulcast (default: false)
   --sora-simulcast-rid TEXT   Simulcast rid (default: none)
diff --git a/doc/USE.md b/doc/USE.md
index 08c30f9..0ee8fa4 100644
--- a/doc/USE.md
+++ b/doc/USE.md
@@ -32,7 +32,6 @@ $ ./zakuro \
     --sora-channel-id zakuro-test \
     --sora-video-codec-type VP8 \
     --sora-video-bit-rate 1000 \
-    --sora-multistream true \
     --resolution 640x480 \
     --fake-capture-device \
     --vcs 5
@@ -119,7 +118,6 @@ zakuro:
         channel-id: "sora"
         role: "sendrecv"
         video-codec-type: VP8
-        multistream: true
         spotlight: true
         simulcast: true
     - name: zakuro2
@@ -129,7 +127,6 @@ zakuro:
         channel-id: "sora"
         role: "sendrecv"
         video-codec-type: VP8
-        multistream: true
         spotlight: true
         simulcast: true
 ```
@@ -173,7 +170,6 @@ zakuro:
         signaling-url: "wss://sora.example.com/signaling"
         channel-id: sora
         role: sendrecv
-        multistream: true
         data-channel-signaling: true
         data-channels:
           - label: "#test"
@@ -206,5 +202,4 @@ zakuro:
           - "wss://sora3.example.com/signaling"
         channel-id: sora
         role: sendrecv
-        multistream: true
 ```
diff --git a/src/util.cpp b/src/util.cpp
index 141d106..b8e6f16 100644
--- a/src/util.cpp
+++ b/src/util.cpp
@@ -199,9 +199,6 @@ void Util::ParseArgs(const std::vector<std::string>& cargs,
   app.add_option("--sora-audio-bit-rate", config.sora_audio_bit_rate,
                  "Audio bit rate (default: none)")
       ->check(CLI::Range(0, 510));
-  app.add_option("--sora-multistream", config.sora_multistream,
-                 "Use multistream (default: false)")
-      ->transform(CLI::CheckedTransformer(bool_map, CLI::ignore_case));
   app.add_option("--sora-simulcast", config.sora_simulcast,
                  "Use simulcast (default: false)")
       ->transform(CLI::CheckedTransformer(bool_map, CLI::ignore_case));
@@ -545,7 +542,6 @@ std::vector<std::vector<std::string>> Util::NodeToArgs(const YAML::Node& inst) {
       DEF_STRING(sora, "sora-", "audio-codec-type");
       DEF_INTEGER(sora, "sora-", "video-bit-rate");
       DEF_INTEGER(sora, "sora-", "audio-bit-rate");
-      DEF_BOOLEAN(sora, "sora-", "multistream");
       DEF_BOOLEAN(sora, "sora-", "simulcast");
       DEF_STRING(sora, "sora-", "simulcast-rid");
       DEF_BOOLEAN(sora, "sora-", "spotlight");
diff --git a/src/zakuro.cpp b/src/zakuro.cpp
index 48a85cf..e9408cf 100644
--- a/src/zakuro.cpp
+++ b/src/zakuro.cpp
@@ -391,7 +391,6 @@ int Zakuro::Run() {
   sora_config.signaling_notify_metadata =
       config_.sora_signaling_notify_metadata;
   sora_config.role = config_.sora_role;
-  sora_config.multistream = config_.sora_multistream;
   sora_config.simulcast = config_.sora_simulcast;
   sora_config.simulcast_rid = config_.sora_simulcast_rid;
   sora_config.spotlight = config_.sora_spotlight;
diff --git a/src/zakuro.h b/src/zakuro.h
index 881167b..ff6aeea 100644
--- a/src/zakuro.h
+++ b/src/zakuro.h
@@ -65,7 +65,6 @@ struct ZakuroConfig {
   int sora_video_bit_rate = 0;
   int sora_audio_bit_rate = 0;
   std::string sora_role = "";
-  bool sora_multistream = false;
   bool sora_simulcast = false;
   std::string sora_simulcast_rid;
   bool sora_spotlight = false;