A wasp blocking device according to the present invention is provided in front of a bee entrance formed open in a beehive main body, and installed to cover the bee entrance formed open in the beehive main body, thus blocking a wasp from entering the beehive main body through the bee entrance or protecting a honeybee that is exposed to the outside and attacked by a wasp. The wasp blocking device is characterized by comprising a wasp blocking mechanism and a wasp obstructing mechanism. The wasp blocking mechanism is composed of: a blocking main body which forms a passage, and in which an end portion on one side is coupled to the beehive body such that an opening portion communicates with the bee entrance; and a first blocking part and a third blocking part, which are spaced apart from the end portion coupled to the beehive body, provided in an opening portion on the other side of the blocking main body, and spaced apart from each other in the longitudinal direction of the blocking main body (110); and a second
