A connector includes a housing (10), terminal fittings (30) to be inserted into the housing (10), a retainer (20) configured to retain the terminal fittings (30) by being mounted into the housing (10) in a direction intersecting an inserting direction of the terminal fittings (30), resilient locks (25) formed on a base end of the retainer (20) in a mounting direction into the housing (10) and configured to hold the retainer (20) in a state mounted in the housing (10) by being locked to the housing (10). Slide-contact portions (28) formed on a tip side of the retainer (20) in the mounting direction into the housing (10) and extending parallel to the mounting direction of the retainer (20), and guides (16) formed in the housing, extending parallel to the mounting direction of the retainer (20) and to be brought into sliding contact with the slide-contact portions (28).