diff --git a/README.org b/README.org
index e19b3d66..2845805d 100644
--- a/README.org
+++ b/README.org
@@ -557,6 +557,7 @@ Simple links may also be written manually in either sexp or non-sexp form, like:
 *Changed*
 +  Give more useful error message for invalid queries.
 +  Predicate ~src~ now matches case-insensitively.
++  Command ~org-ql-sparse-tree~ accepts both string and sexp queries.  (Thanks to [[https://github.com/akirak][Akira Komamura]].)
 
 *Fixed*
 +  Predicate ~src~'s matching of begin/end block lines, normalization of arguments, and handling in non-sexp queries.  (Thanks to [[https://github.com/akirak][Akira Komamura]] for reporting.)
diff --git a/org-ql-search.el b/org-ql-search.el
index cedcadb9..e0ab3ff4 100644
--- a/org-ql-search.el
+++ b/org-ql-search.el
@@ -93,8 +93,8 @@ directories, etc, which would make it slow to list the
 The tree will show the lines where the query matches, and any
 other context defined in `org-show-context-detail', which see.
 
-QUERY is an `org-ql' query sexp (quoted, since this is a
-function).  BUFFER defaults to the current buffer.
+QUERY is an `org-ql' query in either sexp or string form (see
+Info node `(org-ql)Queries').
 
 When KEEP-PREVIOUS is non-nil (interactively, with prefix), the
 outline is not reset to the overview state before finding
@@ -102,7 +102,7 @@ matches, which allows stacking calls to this command.
 
 Runs `org-occur-hook' after making the sparse tree."
   ;; Code based on `org-occur'.
-  (interactive (list (read-minibuffer "Query: ")
+  (interactive (list (read-string "Query: ")
                      :keep-previous current-prefix-arg))
   (with-current-buffer buffer
     (unless keep-previous
@@ -110,7 +110,18 @@ Runs `org-occur-hook' after making the sparse tree."
       ;; we remove existing `org-occur' highlights, just in case.
       (org-remove-occur-highlights nil nil t)
       (org-overview))
-    (let ((num-results 0))
+    (let ((num-results 0)
+          (query (pcase-exhaustive query
+                   ((and (pred stringp)
+                         (rx bos (0+ blank) (or "(" "\"")))
+                    ;; Read sexp query from string.
+                    (read query))
+                   ((pred stringp)
+                    ;; Parse string query into sexp query.
+                    (org-ql--query-string-to-sexp query))
+                   ((pred listp)
+                    ;; Sexp query.
+                    query))))
       ;; FIXME: Accept plain queries as well.
       (org-ql-select buffer query
         :action (lambda ()
diff --git a/org-ql.info b/org-ql.info
index ec95d268..08900a28 100644
--- a/org-ql.info
+++ b/org-ql.info
@@ -1051,6 +1051,8 @@ File: README.info,  Node: 07-pre,  Next: 063,  Up: Changelog
    *Changed*
    • Give more useful error message for invalid queries.
    • Predicate ‘src’ now matches case-insensitively.
+   • Command ‘org-ql-sparse-tree’ accepts both string and sexp queries.
+     (Thanks to Akira Komamura (https://github.com/akirak).)
 
    *Fixed*
    • Predicate ‘src’’s matching of begin/end block lines, normalization
@@ -1733,35 +1735,35 @@ Node: Links37255
 Node: Tips37942
 Node: Changelog38266
 Node: 07-pre39049
-Node: 06341645
-Node: 06242180
-Node: 06142485
-Node: 0643053
-Node: 05246107
-Node: 05146407
-Node: 0546830
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-Node: 04848639
-Node: 04748988
-Node: 04649397
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-Node: 04450166
-Node: 04350525
-Node: 04250728
-Node: 04150889
-Node: 0451136
-Node: 03255237
-Node: 03155640
-Node: 0355837
-Node: 02359137
-Node: 02259371
-Node: 02159651
-Node: 0259856
-Node: 0163934
-Node: Notes64035
-Node: Comparison with Org Agenda searches64197
-Node: org-sidebar65086
-Node: License65365
+Node: 06341784
+Node: 06242319
+Node: 06142624
+Node: 0643192
+Node: 05246246
+Node: 05146546
+Node: 0546969
+Node: 04948498
+Node: 04848778
+Node: 04749127
+Node: 04649536
+Node: 04549944
+Node: 04450305
+Node: 04350664
+Node: 04250867
+Node: 04151028
+Node: 0451275
+Node: 03255376
+Node: 03155779
+Node: 0355976
+Node: 02359276
+Node: 02259510
+Node: 02159790
+Node: 0259995
+Node: 0164073
+Node: Notes64174
+Node: Comparison with Org Agenda searches64336
+Node: org-sidebar65225
+Node: License65504
 
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