A dispensing head for an aerosol container includes a base ring, a transfer conduit with a tip (231) intended to cooperate with the stem of a valve when the dispensing head is mounted on an aerosol container, a push button rotatable relative to the base ring, a blocking member pivotable between a blocking position and an unblocking position, and provided with a bearing surface (312), which is placed in the movement path of the tip (231) towards the valve stem is in the blocking position, and which is outside the movement path of the tip (231) towards the valve stem in the unblocking position, and guiding means (33, 313) for placing the blocking member in the blocking position when the push button is in the locked position and for placing the blocking member in the unblocking position when the push button is in the unlocked position.