A split connector has a frame (10) fittable to a mating connector (B). A mounting portion (13) penetrates the frame (10) in a connecting direction to the mating connector (B), and lock portions (15) are formed on two facing sides of opening edge parts of the mounting portion (13). A support (16) is disposed between the lock portions (15) in an opening area of the mounting portion (13). A sub-connector (25) is to be mounted into the mounting portion (13) while holding terminal fittings (13). Two first locks (27) are formed on the sub-connector (25) and hold the sub-connector (25) in the mounting portion (13) by being locked to the lock portions (15). A second lock (29) is formed on the sub-connector (25) and is lockable to the support (16) in a direction opposite to the connecting direction to the mating connector (B).