Abstract: A crane hook apparatus includes a hook which is rockably mounted on a rotatable stem member extending from a hanging body. A swingable locking device is pivotally mounted on the stem member, and normally assumes by gravity its operative position in which it substantially closes the opening of a recess in the hook. When located in its operative position, the locking device is movable toward its inoperative position inward into the recess, but is blocked from an outward movement. The locking device includes a portion which bears against the interior surface of the hook when it is moved to the inoperative position within the recess. The hanging body is provided with remotely controllable drive means which hauls a suspension member which extends through openings formed in alignment with the axis of the stem member for connection with the locking device.