The present invention relates to a helm used for steering device of a small ship such as a motor boat, the helm for steering device of the ship according to the present invention is connected to the steering shaft of the steering wheel of the ship rotates, for adjusting the rudder on the outer peripheral surface A helm for steering apparatus of a ship having gear grooves into which a cable is engaged, comprising: a disk-shaped first helical body formed in a circumferential direction with a portion of a gear groove portion formed in a circumferential direction at an outer periphery of a first surface; Fixedly coupled to the first surface of the first helmed body, made by casting molding, with a portion of the gear groove of the first helmed body at the outer periphery of the second surface which is in contact with the first surface of the first helmed body; The remaining portion of the gear groove portion is formed in the circumferential direction to form a complete gear groove portion characterized in that it comprises a disk-like second helm body.;According to the present invention, it is possible to form the gear teeth of the gear groove portion on the outer circumferential surface of the helm, and to prevent the occurrence of bubbles in the formation process of the gear groove portion to prevent operation errors, and improve the durability.;Vessel, motorboat, steering system, steering module, helm, casting molding, gear groove
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