The invention relates to a harbour storage facility for liquid fuel, installed close to a quay (2) consisting of at least: an upper surface (21) substantially parallel to the free surface of the sea (9); and a partially submerged front surface (22) adjacent to the upper surface (1). According to the invention, the module (1) is fixed to the quay (2) by anchoring means (3) connecting one of the side faces (102) of the tank (10) to the front surface (22) of the quay (2), the lower face (101) and the side faces (102) of the tank (10) then being at least partially submerged.
