Disclosed is a cap for a cosmetic bottle. The cap for the cosmetic bottle includes a coupling member provided at the upper end thereof with a plurality of moving bars, a button member provided at an inner surface thereof with a plurality of moving grooves so that the moving bars are vertically inserted into the moving grooves, a pumping part being coupled with a lower end of a pumping member, an elastic member interposed between the coupling member and the button member, a rotating member rotatably coupled with an outside of the coupling member, an adjusting member rotatably inserted into an inner surface of an upper end of the rotating member, a button member outputting unit to allow the button member to vertically move up or down if the rotating member is rotated, and a coupling unit to couple the rotating member with the coupling member or the adjusting member.