Bodyshell structure of railcar

A bodyshell structure of a railcar, the bodyshell structure comprising a side bodyshell including a plurality of side window opening portions formed along a railcar longitudinal direction;

• and
• a plurality of seats arranged in the railcar longitudinal direction wherein:
• the side window opening portions include a plurality of large window opening portions arranged on a railcar-longitudinal-direction center portion of the side bodyshell and a plurality of small window opening portions arranged on both railcar-longitudinal-direction sides of the large window opening portions and each having a smaller opening area than the large window opening portion;
• a pitch between the small window opening portions in the railcar longitudinal direction is equal to a pitch between the seats in the railcar longitudinal direction;
• and
• the small window opening portions are arranged such that one small window opening portion corresponds to one seat, and the large window opening portions are arranged such that one large window opening portion corresponds to two seats.