A vehicular cooling device supporting apparatus has a radiator support lower 14 formed with a plurality of support-side connecting portions 32 and 34 for altering connecting positions to radiator support sides 16 and 18. This enables a layout position of a radiator main body 20 to be altered depending on size of an engine to use component parts in common. Placing the radiator main body 20 in a rearward position when the engine is small in size can suppresses damage to the radiator main body 20 upon collision of a vehicle at a low vehicle speed. In this case, it is suffice for the connecting positions of the radiator support lower 14 to the radiator support sides 16 and 18 to be altered in a vehicle fore and aft direction. Thus, the cooling device supporting apparatus can be constructed simply at the low cost with a minimum number of component parts.