Spatial composition in the landscape paintings done by Hiroshige was analyzed in comparison to the types of disposition of the river in relation to the picture frame in the "landscape montage technique". Seven types of disposition of the river in relation to the frame were found : river along the top frame, along the bottom frame, connecting the left and the right frames, connecting the bottom and the side frame, connecting the horizon and the side frame, part of the bottom frame, or the entire bottom frame. Characteristics of spatial composition according to these types were clarified.