[Problem] The present invention aims to suppress the water, foreign materials and the like entering the unpurified chamber, simultaneously to improve the outer appearance performance in the air cleaner apparatus for straddle type vehicle.
[Means for Solving Problem] In an air cleaner apparatus 30 comprising: an air cleaner case 40 whose inside is divided into an unpurified chamber 44 and a purified chamber 46 by an air cleaner element 42; an intake duct 50 attached to the air cleaner case 40 so as to communicate with the unpurified chamber 44, simultaneously provided with an air inlet opening 52 directing the front direction; a cover member 60 forming an intake passage 62 between the air cleaner case 40 and the cover member and covering an air inlet opening 52, the cover member 60 extends in the longitudinal direction of the vehicle such that the longitudinal length becomes longer than the vertical length, the air inlet opening 52 is positioned further frontward than the longitudinal center of the air cleaner case 40, an air inlet 70 to the intake passage 62 is formed further rearward than the longitudinal center of the air cleaner case 40 as well as on the rear portion of the cover member 60.