PROJECTION DEVICE

A projection device (1) includes a housing (4) including a wall part including an opening, and a cover (5) with a plate shape having a light-transmitting property and closing the opening. The wall part includes a pair of edge parts facing each other with the opening therebetween and extending along a first direction, and a plurality of claw parts (6) disposed at each of the pair of edge parts. The pair of edge parts is curved to the inside of the housing. The cover includes through holes disposed correspondingly to the claw parts. The claw part includes a base part protruding from the corresponding edge part and a holding part (62) protruding from the base part along the first direction. The housing sandwiches and holds the cover between an edge part (32) and the holding parts (62) inserted into the through holes in a state where the cover is curved.