This connector comprises: a connector housing (11), on one side of which is formed a flat cable terminal-section insertion section (13) wherein a flat cable terminal-section (26) is inserted, and on the other side of which is formed an interlocking hood section (15) wherein a mating connector (5) in an electric wire terminal connected to a flat cable (2) interlocks; and a relay terminal (3) which is accommodated inside the connector housing (11), connects with a terminal fitting (7) in an electrical wire terminal, one end of which is connected to the flat cable terminal section (26) and the other end of which is accommodated in the mating connector (5), and connects the flat cable (2) and electrical wire (6). A sealant accommodating section (17), wherein a sealant (9) which is attached to the flat cable terminal section (26) is accommodated, is provided in the flat cable terminal section insertion section (13).