The present invention relates to a wave-dissipating block comprising: a body which is placed on a seabed in a vertical direction and which is in the shape of a polygonal column, a cylinder, an oval column, a cross column and the like； male coupling protrusions respectively provided on a side surface of the body in a height direction and on the other surface facing same； female coupling grooves respectively provided on the side surface of the body in the height direction and on the other surface thereof facing same, and provided in a shape corresponding to the male coupling protrusion； a habitat part formed as a space provided in a center portion of the body or a portion of the body so as to enable seawater to pass therethrough or remain therein, thereby having a fish and shellfish habitat and wave-dissipating function； a partition provided as a plate for separating the habitat part, so as to provide structural stability to the body and provide a habitat environment for fish and shellfish； a through-hole formed at the partition so as to connect the habitat parts so that the habitat parts can communicate with each other, thereby enabling the movement of fish and shellfish and the flow of the seawater； and a space part, which forms the space between the plurality of bodies connected adjacently to each other, so as to enable the seawater to pass therethrough or stay therein, thereby having the fish and shellfish habitat and wave-dissipating function, wherein a plurality of insertion protrusions are provided on the outer surface of the body or the inner surface of the body for dividing the habitat part, and insertion grooves are formed between the plurality of insertion protrusions, and the male coupling protrusion is inserted into the female coupling groove so that the wave-dissipating blocks can be extended in the horizontal and vertical directions on the seabed.La présente invention concerne un bloc de dissipation de vagues comprenant : un corps qui est placé sur un f
