Abstract: A hose clamp comprises a circular clamp body of resilient material having an axis, a central portion and circumferentially overlapping opposite ends having axially adjacent inner edges. The body is circumferentially spreadable against the resiliency of said material from an unexpanded to an expanded condition in which a keeper on one of the ends circumferentially interengages with a catch on the other end to releasably hold said body in said expanded condition. The opposite ends of the body are displaceable relative to one another to disengage the keeper and catch to release the body for return to the unexpanded condition, and the central portion is provided with openings which, in combination with the structure of the ends, provide uniformity of clamping force around the circumference of the clamp.