diff --git a/clang-tools-extra/clang-tidy/bugprone/ThrowKeywordMissingCheck.cpp b/clang-tools-extra/clang-tidy/bugprone/ThrowKeywordMissingCheck.cpp
--- a/clang-tools-extra/clang-tidy/bugprone/ThrowKeywordMissingCheck.cpp
+++ b/clang-tools-extra/clang-tidy/bugprone/ThrowKeywordMissingCheck.cpp
@@ -24,11 +24,13 @@
       cxxConstructExpr(
           hasType(cxxRecordDecl(
               isSameOrDerivedFrom(matchesName("[Ee]xception|EXCEPTION")))),
-          unless(anyOf(hasAncestor(stmt(
-                           anyOf(cxxThrowExpr(), callExpr(), returnStmt()))),
-                       hasAncestor(decl(anyOf(varDecl(), fieldDecl()))),
-                       allOf(hasAncestor(CtorInitializerList),
-                             unless(hasAncestor(cxxCatchStmt()))))))
+          unless(anyOf(
+              hasAncestor(
+                  stmt(anyOf(cxxThrowExpr(), callExpr(), returnStmt()))),
+              hasAncestor(decl(anyOf(varDecl(), fieldDecl()))),
+              hasAncestor(expr(cxxNewExpr(hasAnyPlacementArg(anything())))),
+              allOf(hasAncestor(CtorInitializerList),
+                    unless(hasAncestor(cxxCatchStmt()))))))
           .bind("temporary-exception-not-thrown"),
       this);
 }
diff --git a/clang-tools-extra/docs/ReleaseNotes.rst b/clang-tools-extra/docs/ReleaseNotes.rst
--- a/clang-tools-extra/docs/ReleaseNotes.rst
+++ b/clang-tools-extra/docs/ReleaseNotes.rst
@@ -148,6 +148,10 @@
 
 - Fixed a false positive in :doc:`fuchsia-trailing-return
   <clang-tidy/checks/fuchsia-trailing-return>` for C++17 deduction guides.
+  
+- Fixed a false positive in :doc:`bugprone-throw-keyword-missing
+  <clang-tidy/checks/bugprone-throw-keyword-missing>` when creating an exception object
+  using placement new
 
 Removed checks
 ^^^^^^^^^^^^^^
diff --git a/clang-tools-extra/test/clang-tidy/checkers/bugprone-throw-keyword-missing.cpp b/clang-tools-extra/test/clang-tidy/checkers/bugprone-throw-keyword-missing.cpp
--- a/clang-tools-extra/test/clang-tidy/checkers/bugprone-throw-keyword-missing.cpp
+++ b/clang-tools-extra/test/clang-tidy/checkers/bugprone-throw-keyword-missing.cpp
@@ -175,3 +175,14 @@
 void exceptionRAIITest() {
   ExceptionRAII E;
 }
+
+namespace std {
+typedef decltype(sizeof(void*)) size_t;
+}
+
+void* operator new(std::size_t, void*);
+
+void placeMentNewTest() {
+  alignas(RegularException) unsigned char expr[sizeof(RegularException)];
+  new (expr) RegularException{};
+}