An instrument box (10) and a terminal block (20, 120) including a resin housing (21) and a bus bar (41) are provided. The resin housing (21) has a housing body (22) fixed to a box wall surface (11); and a bus bar housing (32) formed integrally with the housing body (22) and inserted into an insertion hole (12) of the box wall surface (11). The bus bar (41) has a bus bar body (42) inserted into the insertion hole (12) with fitted in the resin housing (21) and housed in the bus bar housing (32); a first terminal connecting portion (43) on one side of the bus bar body (42) to connect with the cable terminal end outside the instrument box (81); and a second terminal connecting portion (44) on another side of the bus bar body (42) to connect with the terminal inside the instrument box (10).