A connector (1) includes a housing (2), a first terminal (31) and a second terminal (32). The terminals (31, 32) are side by side and parallel. One end of each terminal is inserted into the housing (2) and the other end projects from the housing (2). Each of the terminals (31, 32) includes a base (33) projecting from the housing (2) and a connecting portion (34) that is wider than the base (33) toward both sides in an arrangement direction (Y) of the first and second terminals (31, 32). The connecting portion (34) of the first terminal (31) projects farther from the housing (2) than the connecting portion (34) of the second terminal (32). An insulating member (4) is at a position adjacent to the connecting portion (34) of the second terminal (32) in the arrangement direction (Y) on a surface of the base (33) of the first terminal (31).