This culture apparatus is provided with: an outer box; an inner box which is disposed inside the outer box, and which comprises a metal plate; and a door for opening/closing an opening formed in a front surface of the outer box and the inner box. The culture apparatus cultures, inside the inner box, bodies to be cultured. Both side plates of the inner box have protruded parts in which shelf supports are formed by way of press working, said shelf supports having, placed thereon, both side parts of bottom surfaces of shelf plates upon which the bodies to be cultured are placed. Protruded-part surfaces which face both side parts of the shelf plates in a width direction are press worked so as to be positioned in a direction heading away from both side plates of the outer box, and towards a packing provided to the opening in a vertical direction.