Abstract: A pipe hanger hooks or unhooks lower ends of semicircular bands divided left and right by means of a hooking means, mounts mounting plates integrally formed at the lower end of a supporting bracket to mounting plates integrally formed at upper ends of the semicircular bands, provides a resiliently biasing means in the supporting bracket to resiliently bias a nut block in an upward direction, couples a locking plate or rod into the mounting plates of the other-side semicircular band and the supporting bracket, mounts a locking cap and a locking guide to the mounting plate of the one-side semicircular band, and forms a hook of the lower end of the other-side semicircular band so as to extend beyond the vertical center line of an inner space defined by the semicircular bands. Thereby, the resiliently biasing means is provided in the supporting bracket to thus retain block.