A joint connector includes shorting members (30), a housing body (HB) having a shorting member accommodating portion (50) for holding the shorting members (30), and a shorting member retainer (70). The shorting member (30) includes a base (32) extending in a shorting direction and shorting-side terminals (34, 36) projecting from this base (32) in a fitting direction. The shorting member retainer (70) is mounted into the housing body (HB) in a mounting/detaching direction intersecting both the shorting direction and the fitting direction. The shorting member retainer (70) includes shorting member constraining portions (74) configured to cross the shorting members (30) in the mounting/detaching direction to restrict movements of the shorting members (30) in the fitting direction.