STRUCTURE FOR CHANGING PASSENGER COMPARTMENT SEAT ARRANGEMENT

Provided is a structure for freely changing an arrangement interval of seats (2) in a vehicle cabin (1) of a vehicle, the structure including: a support frame (3) configured to support the seats (2) from below as a cantilever beam to define a space between the seats (2) and a floor plate (10) of the vehicle; a guide rail (40) provided along a side structure (11) of the vehicle along a longitudinal direction of the vehicle cabin (1); a support slider (41), which is fixed to a base end portion of the support frame (3) and is assembled to the guide rail (40), and is freely movable along the guide rail (40) while bearing a load and a rotation moment acting from the support frame (3); and a locking pin (49) configured to fix the support slider (41) to the guide rail (40).