An angle adjust device for a cymbal includes a connecting seat mounted to a free end of a cymbal stand. The connecting includes a hollow stub longitudinally extending through the connecting seat and a protrusion laterally extending from the connecting seat. A connector is mounted to the protrusion of the connecting seat and has a trough defined in the connector. The trough has an opening defined in one side of the connector facing the connecting seat. An actuated rod is limited in the connector. The actuated rod has a threaded section screwed into the threaded hole in the slider and a polygonal head co-axially extending from the threaded section through the connector for user to easily rotate the actuated rod and adjust a distance between the slider and the connecting seat.