A key structure includes a carrying body, a frame body, a keycap and at least two independent connecting members. The frame body is disposed on the carrying body and forms plurality of sliding grooves. The keycap has a plurality of cap edges and is disposed with a plurality of pivoting portions. The at least two connecting members are each connected between the keycap and the frame body, corresponding to two of the cap edges opposite to each other. Each connecting member includes a pivoting rod and a sliding rod. Each pivoting rod pivots on one of the pivoting portions, and each sliding rod is slidably limited in one of the sliding grooves. This design has preferred structural strength, smooth pressing movement and reliable pressing contact.