A vehicle blower unit is provided to insert guide ribs of a filter cover into an installing chamber via rails of the installing chamber for assembling the filter cover into the installing chamber at a precise position, thereby simplifying the assembling or disassembling of the filter cover. A vehicle blower unit includes a filter cover(135) formed with guide ribs(136) at both ends, wherein the guide ribs guide an assembling position of the filter cover in an inlet of an installing chamber(127) for an air filter(130) by contacting inner wall surfaces of the installing chamber closely. The installing chamber has rails(128) on the inner wall surfaces so that the guide ribs are inserted into the installing chamber via the rails.
