diff --git a/gc.c b/gc.c
index f91d1e3..ef65c8b 100644
--- a/gc.c
+++ b/gc.c
@@ -1741,6 +1741,10 @@ newobj_of(VALUE klass, VALUE flags, VALUE v1, VALUE v2, VALUE v3)
 #endif
 
     objspace->total_allocated_objects++;
+
+    rb_thread_t *th = GET_THREAD();
+    th->allocated_objects++;
+
     gc_event_hook(objspace, RUBY_INTERNAL_EVENT_NEWOBJ, obj);
     gc_report(5, objspace, "newobj: %s\n", obj_info(obj));
 
diff --git a/test/ruby/test_thread.rb b/test/ruby/test_thread.rb
index ade680c..f77df5f 100644
--- a/test/ruby/test_thread.rb
+++ b/test/ruby/test_thread.rb
@@ -1046,4 +1046,17 @@ q.pop
       t.new {}
     end
   end
+
+  def test_thread_allocated_objects
+    count = 0
+    t = Thread.new do
+      1000.times do
+        Object.new
+      end
+      count += Thread.current.allocated_objects
+    end
+
+    t.join
+    assert_equal 1000, count
+  end
 end
diff --git a/thread.c b/thread.c
index 6cf6d52..44e692f 100644
--- a/thread.c
+++ b/thread.c
@@ -2568,6 +2568,14 @@ rb_thread_group(VALUE thread)
     return group;
 }
 
+VALUE
+rb_thread_allocated_objects(VALUE thread)
+{
+    rb_thread_t *th;
+    GetThreadPtr(thread, th);
+    return LONG2NUM(th->allocated_objects);
+}
+
 static const char *
 thread_status_name(rb_thread_t *th)
 {
@@ -5036,6 +5044,7 @@ Init_Thread(void)
     rb_define_method(rb_cThread, "abort_on_exception=", rb_thread_abort_exc_set, 1);
     rb_define_method(rb_cThread, "safe_level", rb_thread_safe_level, 0);
     rb_define_method(rb_cThread, "group", rb_thread_group, 0);
+    rb_define_method(rb_cThread, "allocated_objects", rb_thread_allocated_objects, 0);
     rb_define_method(rb_cThread, "backtrace", rb_thread_backtrace_m, -1);
     rb_define_method(rb_cThread, "backtrace_locations", rb_thread_backtrace_locations_m, -1);
 
diff --git a/vm_core.h b/vm_core.h
index 97df64f..f78cc0a 100644
--- a/vm_core.h
+++ b/vm_core.h
@@ -598,6 +598,7 @@ typedef struct rb_thread_struct {
     int safe_level;
     int raised_flag;
     VALUE last_status; /* $? */
+    long allocated_objects;
 
     /* passing state */
     int state;