The present invention discloses a padlock with an accommodating space, comprising: a lock case possessing a base and a cover body pivoted with each other; a lock hook, which is movably positioned on the base; a clamping unit, which is movably positioned on the cover body and possesses a hook part which can hook the lock hook to prevent the cover body from pivoting with respect to the base and then being opened; a number wheel element arranged on the cover body to control the clamping unit, then to determine whether the hook part of the clamping unit can be allowed to displace towards the direction of departing from the lock hook.