A connector includes a connector housing (30) having a separation wall (33), through which a plurality of terminal fittings (20) penetrate, and a receptacle (51) configured to surround a group of the terminal fittings (20) projecting from the separation wall (33), a filling recess (55) configured to surround the terminal fittings (20) in the receptacle (51) and fill a potting agent (80) inside, and auxiliary reservoir portions (57) for the potting agent (80) formed to have a recessed shape on an inner peripheral surface side of the receptacle (51) while communicating with each filling recess (55).