Abstract: A knockdown fishing and/or leisure boat comprises two identical floats on which rests a deck. Each of the floats is provided, in its superior median axis, with a plurality of threaded bolts evenly spaced to assure dismountable attachment of a same quantity of identical deck planks connecting the two floats parallel to each other. This is accomplished by means of an opening provided at each extremity of the planks to allow the threaded bolts of the float to pass through. A manually turnable nut is threaded on each bolt to tighten each plank to the floats.