The invention discloses a wall clock which is easy to stably hang on a wall surface. The wall clock hangs on the wall surface and is clamped and fixed with a wall surface screw cap. The wall clock includes a housing, a clock panel arranged at the front side of the housing, and a hanging panel arranged at the back side of the housing. The hanging panel is provided with a hanger connected with the housing. The hanger is fixedly connected with the housing, and is a block with a hollow cavity. The hanger is provided with a window communicating the hollow cavity with the outside. The window includes a big circular hole and a semicircle hole for clamping the wall surface screw cap. The semicircle hole communicates with the large circular hole, and the diameter of the large circular hole is larger than that of the semicircle hole. The invention provides the wall clock which is easy to stably hang on the wall surface, can judge whether the wall clock is firmly buckled with the wall surface screw cap through touch, vision and hearing, thereby ensuring the firmly buckling of the wall clock and the wall surface screw cap. The wall clock which is easy to stably hang on the wall surface is convenient and practical. Accidents that the wall clock falls off, is destroyed and even hurts people are effectively prevented, and a loudspeaker, a vibrator, and an LED lamp in the hanger are not easy to be damaged. The reliability is high.