A mouse structure includes a housing defining an opening and accommodating space therein, a pair of track devices fixed onto the housing in the accommodating space, a sliding device slidably coupled with the pair of track devices. Each track device has a sliding channel, a first position portion, and at least a second position portion. A limiting side is formed at an end of the sliding channel. The sliding device includes a base portion and an operating portion, the operating portion having a first rod and at least a second rod. When the sliding device slides along the sliding channels for use, the first rods are firstly retained by the limiting sides, and then moved upwards to allow the first and second rods to be located at the first and second position portions respectively, where the base portion is in alignment with an upper wall of the housing.