To provide a light vehicular side surface protection device having a favorable maintenance property and a rectification operation for a wind from the lateral direction of a vehicle and also a cooling operation in an engine room.

A belt plate shape side guard 1 is supported in parallel with a load stand 11 through installation stays 2a, 2b so as to form a clearance part 10 with a prescribed clearance on the lower parts of both side surfaces of a vehicular load stand 11 and this side guard 1 is formed in a bent surface shape so that the lower end 5 can be bent inside the lower part of the load stand 11. Further, an air escape hole is formed at the position of the rear part of a vehicular engine on the side guard 1 and a window for maintenance is formed at the position in which a function part 12 installed on the lower part of the load stand 11 is arranged.