Abstract: A holder for a string-type or similar mop head. The holder is preferably made entirely of plastic and comprises a yoke, a mop head support member connecting the free ends of the arms of the yoke, and a mop head clamping assembly reciprocally mounted inside the yoke for clamping a mop head against the support member. The mop holder is opened for insertion or removal of a mop head by shifting the support member longitudinally to unlatch it and then rotating the support member out of the plane defined by the arms of the yoke.