A battery case enables a battery cell to be placed in a continuously pressured state without increasing the complexity of the battery module manufacturing process. Specifically, the battery case has: a plastic first accommodation unit and second accommodation unit in which a laminated body of a battery cell is accommodated; a UD tape integrally positioned on a first side wall, a second side wall, and a third side wall, which form the first accommodation unit; and a UD tape integrally positioned on the first side wall, which form the second accommodation unit. The UD tapes are configured, in particular, to be positioned straddling the third side walls from the second side walls across the first side wall.