A wireless mouse includes a housing, a wireless signal receiver, a power switch, a carrier seat and a push-push element. The power switch is arranged inside the housing and includes a triggering part. The carrier seat is movably installed inside the housing for carrying the wireless signal receiver thereon and has a knob exposed outside a surface of the housing. The push-push element is arranged inside the housing and includes a clipping part for engaging with the carrier seat to fix the carrier seat in a first position or a second position. When the carrier seat is fixed in the first position, the carrier seat contacts the triggering part of the power switch to turn off the power switch.