抄録
As the space in trains is limited, the trade-off between space and comfort is important issue to clarify. From this viewpoint, two experiments were performed by using an experimental Shinkansen triple-seat unit. As a result, it was found that a wider middle seat and narrower armrest is comfortable when the overall width is constant, and a wider armrest and narrower seat is also comfortable for those who use armrests, and that, the distance between the front face of the seat cushion and the back of the front seat is an adequate index in regard to the seat intervals.
