A water wave-type power generating device is mounted on a shore, and includes a hub, a power generating unit, a transmitting track unit surrounding and movable relative to the hub along an endless course to generate a rotational force, a rotation transmitting unit coupled with the transmitting track unit and receiving the rotational force to generate the torque that is transmitted to the power generating unit by a torque transmitting unit, and a plurality of wave heading members disposed on the transmitting track unit and each having a heading surface that is subjected to waves of water in a wave ascending direction so as to actuate the movement of the transmitting track unit.