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 (100) 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).