A ribbon dispenser includes a body with a front cover. A cylinder is rotatably located in the body and has multiple chambers in which ribbons are received. An inlet is defined through the rear end of each chamber. A striking unit is located in the body and located behind the cylinder to introduce air into the chambers via the inlets. A revolving unit is connected to the cylinder to revolve the cylinder. A rigger is pivotably connected to the body has a driving portion to drive the striking unit. A stud protrudes from one side of the trigger so as to drive the revolving unit. The ribbons are ejected out from the body when the striking unit introduces air into the chambers. The cylinder is revolved to allow the ribbons in each room are ejected in sequence.