Provided is a chute-type cap sterilization-cleaning device which transfers caps and performs sterilization-cleaning by injecting sterilization-cleaning liquid from a propulsion nozzle, wherein a controller (11) and a solenoid valve for controlling a plurality of reverse propulsion nozzles (2e) are provided, and wherein when sterilization and cleaning of a cap (C) is continued at a chute portion for sterilization-cleaning while cap transfer is stopped by a dividing device, in order to relax the accumulated pressure on the cap (C) at the downstream side, the reverse propulsion nozzles (2e) performing straight injection of the sterilization-cleaning liquid toward the reverse side with respect to the transfer direction of the cap (C) are arranged along the chute portion for sterilization-cleaning so that the injected flows are in contact with the inner surfaces of several caps (C).