The invention discloses a key structure comprising a keycap, a base plate, and a support member. The keycap comprises a slide part; the base plate comprises an engagement part; the support member comprises a slide end and an engagement end, and the support member is used for engaging the keycap and the base plate. The slide end slides along the slide part, and the engagement end is engaged to the engagement part. Therein, the slide end comprises a connection part, and the connection part comprises at least one concave part or at least one hole.