The invention provides a hose clamp which can be produced at a low cost and quickly clamp a hose. The hose clamp is made of resin and made by integrally forming a generally annular clamp body which is partially cut out and a lever continuing to an end of the cut out, of the clamp body. The lever includes a first operating piece which is rotatably connected to one of the cut-out ends of the clamp body via a first hinge and has an engagement part on its tip and a second operating piece rotatably connected to the other of the cut-out ends of the clamp body via a second hinge. The tip of the second operating piece is connected to the first operating piece. An engaged part 8 corresponding to the engagement part is formed on the outer periphery of the clamp body.