A steering gear for boats includes a control member connected to a drive shaft of a transmission having at least two dynamically engaged transmission elements, in particular, an input element and an output element. The output element drives a motion transfer member of the control member transferring motion to an operating unit, such that any displacement/rotation of the control member is transferred to the transfer member through the transmission. The motion transfer member includes a pull and/or push cable and a coupling member that is slidably attached to the steering gear and has a plurality of coupling seats, at least one of which is designed to engage a corresponding coupling claw on the steering gear. The coupling member includes a sheath-like element in which the pull and/or push cable is configured to slide, and the coupling seats include two annular throats of the sheath.