Abstract: A connector includes wire-side terminals having the same shape and an insulation housing (30) for holding these terminals. The insulation housing (30) has terminal accommodating chambers (C11, . . . ), and terminal locking portions are provided in the respective terminal accommodating chambers (C11, . . . ). The terminal locking portions are classified into a first group that have a high holding force and a second group that have a low holding force. At least the terminal locking portions in the terminal accommodating chambers (C11, C18, C31, C38) located on both outer sides in a maximum diameter direction belong to the first group and at least the terminal locking portions provided in the terminal accommodating chambers (C24, C25) closest to a center (O) of the array of the terminal accommodating chambers belong to the second group.