A foldable floor stand for guitar, comprises supporting rods, whose top ends are intermeshed, and aluminum tubes connecting with bottom ends of the supporting rods to support a guitar; two plastic engagers are set on top of the supporting rods, a rotatable pad apparatus contacting with guitar surface is arranged on side of the plastic engager supporting the guitar. Due to adopting a pad apparatus to make the plastic supporting panel and back face of the guitar contact in surface, frictions are increased and placements of a guitar or other music instruments onto the stand are more stable, more secure, harder to slide and fall. Connecting supporting rods and aluminum tubes moveably, makes it convenient to adjust positions of supporting rods, to adopt different styles of guitars; it is possible to fold supporting rods wholly inside range of aluminum tubes, making it convenient to carry.