To provide a vehicular frame in which a folding shape thereof is simplified, the strength and the rigidity are increased, and the vehicular appearance is enhanced by a vehicle body frame.

In a vehicle 10 in which a front fork 14 is steerably mounted on a head pipe 12, a front wheel 16 is mounted on the front fork 14, and a main frame 21 as one frame extends backwardly from the head pipe 12, the main frame 21 has a shape that a letter S is laid horizontally in the longitudinal direction of the vehicle in side view, a bottom part 36a as a foot-crossing part and floor supporting parts 44 and 45 as foot rest parts are provided on a front arc part 36 which is projecting downwardly and provided on a front half part of the letter S, and an engine 27 is arranged in a lower space of a rear arc part 38 which is projecting upwardly and provided on a rear half part of the letter S.