Abstract: A pneumatic boat comprising at least one inflatable fender (1) forming two approximately parallel branches (2) and a transom (4) extending between these two branches (2), each branch (2) being constituted by several tubular compartments (8, 9) placed side by side longitudinally and superposed having a poly-lobed cross section the major axis of which is tilted in relation to the horizontal; the lower compartment (9) of each branch (2) includes a flexible casing (11) integral with the compartment immediately above (8) and retaining a detachable float (12); the casing and the float are mutually shaped so that the float is applied by the casing against the compartment immediately above and that the external lateral part (10) of the casing is stretched approximately tangentially between these, forming with a horizontal plane an average angle of between 5 and 45° approximately.