The present invention relates to a wasp blocking device provided in the beehive, which is installed to cover a bee entrance opening formed in a beehive main body to block the wasp from entering the beehive main body through the bee entrance or to be exposed to the outside to protect the bees attacked by the wasp. The wasp blocking device comprises: a blocking main body which forms a passage and in which one end is coupled to the beehive main body, and an opening unit is communicated to the bee entrance; and a first blocking unit, a third blocking unit, and a second blocking unit spaced apart from an end coupled to the beehive main body, provided at the other opening unit of the blocking main body and spaced apart from each other in the longitudinal direction of the blocking main body (110), wherein the first blocking unit consists of a plurality of first muntins spaced apart from each other in the horizontal direction, the third blocking unit consists of a plurality of third muntins spaced apart from each other in the horizontal direction, and the second blocking unit consists of a plurality of second muntins spaced apart from each other in the vertical direction and is located between the third blocking unit and the beehive main body in the longitudinal direction.
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