A clamp for a musical instrument stand is equipped with a pipe retaining section having a metal base section formed with an abutting surface having a cylindrical inner peripheral surface, and a metal fastening section formed with a fastening surface having a cylindrical inner peripheral surface that is opposite to the abutting surface of the base section, wherein the abutting surface and the fastening surface hold an outer peripheral surface of a pipe from one side and another side to retain the pipe, and the clamp comprises a pipe sleeve in a semi-cylindrical shape that is made of a resin material, and has an outer peripheral surface to be abutted to the abutting surface or the fastening surface so as to be mounted on the abutting surface or the fastening surface; and a recessed section that is provided in a concave shape in a portion of at least one surface among an outer peripheral surface of the pipe sleeve, the abutting surface and the fastening surface, wherein a predetermined space surrounded by the recessed section and a surface opposite to the recessed section is formed between the abutting surface and the outer peripheral surface of the pipe sleeve opposite to the abutting surface or between the fastening surface and the outer peripheral surface of the pipe sleeve opposite to the fastening surface.