diff --git a/flang/include/flang/Parser/dump-parse-tree.h b/flang/include/flang/Parser/dump-parse-tree.h
--- a/flang/include/flang/Parser/dump-parse-tree.h
+++ b/flang/include/flang/Parser/dump-parse-tree.h
@@ -582,6 +582,8 @@
   NODE(OmpReductionCombiner, FunctionCombiner)
   NODE(parser, OmpReductionInitializerClause)
   NODE(parser, OmpReductionOperator)
+  NODE(parser, OmpAllocateClause)
+  NODE(OmpAllocateClause, Allocator)
   NODE(parser, OmpScheduleClause)
   NODE_ENUM(OmpScheduleClause, ScheduleType)
   NODE(parser, OmpScheduleModifier)
diff --git a/flang/include/flang/Parser/parse-tree.h b/flang/include/flang/Parser/parse-tree.h
--- a/flang/include/flang/Parser/parse-tree.h
+++ b/flang/include/flang/Parser/parse-tree.h
@@ -3415,6 +3415,13 @@
   std::tuple<OmpReductionOperator, std::list<Designator>> t;
 };
 
+// OMP 5.0 2.11.4 allocate-clause -> ALLOCATE ([allocator:] variable-name-list)
+struct OmpAllocateClause {
+  TUPLE_CLASS_BOILERPLATE(OmpAllocateClause);
+  WRAPPER_CLASS(Allocator, ScalarIntExpr);
+  std::tuple<std::optional<Allocator>, OmpObjectList> t;
+};
+
 // 2.13.9 depend-vec-length -> +/- non-negative-constant
 struct OmpDependSinkVecLength {
   TUPLE_CLASS_BOILERPLATE(OmpDependSinkVecLength);
@@ -3490,9 +3497,9 @@
       Firstprivate, From, Grainsize, Lastprivate, NumTasks, NumTeams,
       NumThreads, Ordered, Priority, Private, Safelen, Shared, Simdlen,
       ThreadLimit, To, Link, Uniform, UseDevicePtr, IsDevicePtr,
-      OmpAlignedClause, OmpDefaultClause, OmpDefaultmapClause, OmpDependClause,
-      OmpIfClause, OmpLinearClause, OmpMapClause, OmpProcBindClause,
-      OmpReductionClause, OmpScheduleClause>
+      OmpAlignedClause, OmpAllocateClause, OmpDefaultClause,
+      OmpDefaultmapClause, OmpDependClause, OmpIfClause, OmpLinearClause,
+      OmpMapClause, OmpProcBindClause, OmpReductionClause, OmpScheduleClause>
       u;
 };
 
diff --git a/flang/lib/Parser/openmp-parsers.cpp b/flang/lib/Parser/openmp-parsers.cpp
--- a/flang/lib/Parser/openmp-parsers.cpp
+++ b/flang/lib/Parser/openmp-parsers.cpp
@@ -104,6 +104,11 @@
 TYPE_PARSER(construct<OmpReductionClause>(
     Parser<OmpReductionOperator>{} / ":", nonemptyList(designator)))
 
+// OMP 5.0 2.11.4  ALLOCATE ([allocator:] variable-name-list)
+TYPE_PARSER(construct<OmpAllocateClause>(
+    maybe(construct<OmpAllocateClause::Allocator>(scalarIntExpr) / ":"),
+    Parser<OmpObjectList>{}))
+
 // 2.13.9 DEPEND (SOURCE | SINK : vec | (IN | OUT | INOUT) : list
 TYPE_PARSER(construct<OmpDependSinkVecLength>(
     Parser<DefinedOperator>{}, scalarIntConstantExpr))
@@ -206,6 +211,8 @@
         construct<OmpClause>(parenthesized(Parser<OmpProcBindClause>{})) ||
     "REDUCTION" >>
         construct<OmpClause>(parenthesized(Parser<OmpReductionClause>{})) ||
+    "ALLOCATE" >>
+        construct<OmpClause>(parenthesized(Parser<OmpAllocateClause>{})) ||
     "SAFELEN" >> construct<OmpClause>(construct<OmpClause::Safelen>(
                      parenthesized(scalarIntConstantExpr))) ||
     "SCHEDULE" >>
diff --git a/flang/lib/Parser/unparse.cpp b/flang/lib/Parser/unparse.cpp
--- a/flang/lib/Parser/unparse.cpp
+++ b/flang/lib/Parser/unparse.cpp
@@ -2207,6 +2207,12 @@
     Walk(std::get<std::list<Designator>>(x.t), ",");
     Put(")");
   }
+  void Unparse(const OmpAllocateClause &x) {
+    Word("ALLOCATE(");
+    Walk(std::get<std::optional<OmpAllocateClause::Allocator>>(x.t), ":");
+    Walk(std::get<OmpObjectList>(x.t));
+    Put(")");
+  }
   void Unparse(const OmpDependSinkVecLength &x) {
     Walk(std::get<DefinedOperator>(x.t));
     Walk(std::get<ScalarIntConstantExpr>(x.t));
diff --git a/flang/test/Semantics/omp-clause-validity01.f90 b/flang/test/Semantics/omp-clause-validity01.f90
--- a/flang/test/Semantics/omp-clause-validity01.f90
+++ b/flang/test/Semantics/omp-clause-validity01.f90
@@ -1,5 +1,5 @@
 ! RUN: %S/test_errors.sh %s %t %f18 -fopenmp
-
+use omp_lib
 ! Check OpenMP clause validity for the following directives:
 !
 !    2.5 PARALLEL construct
@@ -13,6 +13,11 @@
   integer, parameter :: num = 16
   real(8) :: arrayA(256), arrayB(512)
 
+  integer(omp_memspace_handle_kind) :: xy_memspace = omp_default_mem_space
+  type(omp_alloctrait) :: xy_traits(1) = [omp_alloctrait(omp_atk_alignment,64)]
+  integer(omp_allocator_handle_kind) :: xy_alloc
+  xy_alloc = omp_init_allocator(xy_memspace, 1, xy_traits)
+
   arrayA = 1.414
   arrayB = 3.14
   N = 1024
@@ -25,7 +30,8 @@
 !                        shared-clause |
 !                        copyin-clause |
 !                        reduction-clause |
-!                        proc-bind-clause
+!                        proc-bind-clause |
+!                        allocate-clause
 
   !$omp parallel
   do i = 1, N
@@ -33,6 +39,30 @@
   enddo
   !$omp end parallel
 
+  !$omp parallel allocate(b)
+  do i = 1, N
+     a = 3.14
+  enddo
+  !$omp end parallel
+
+  !$omp parallel allocate(omp_default_mem_space : b, c)
+  do i = 1, N
+     a = 3.14
+  enddo
+  !$omp end parallel
+
+  !$omp parallel allocate(b) allocate(c)
+  do i = 1, N
+     a = 3.14
+  enddo
+  !$omp end parallel
+
+  !$omp parallel allocate(xy_alloc :b) 
+  do i = 1, N
+     a = 3.14
+  enddo
+  !$omp end parallel
+
   !ERROR: SCHEDULE clause is not allowed on the PARALLEL directive
   !$omp parallel schedule(static)
   do i = 1, N