A pedal support for percussion instruments comprises a frame including a perpendicularly door-shaped supporting portion and a horizontal mounting portion, the supporting portion being fixed on the mounting member and including two ends, each having a positioning hole formed thereon, the two positioning holes axially coupling with two L-shaped connecting members individually so that the connecting members allow to swing between a first position and a second position, and each of the connecting members including a retaining slot; and a U-shaped piece being pivotally connected to one end of the mounting portion, wherein as the connecting members are located at the first position, the connecting members and the frame are in a retracted status, as the connecting members are located at the second position, the retaining slots of the connecting members engage on the U-shaped piece.