An air cleaner device is provided for a scooter-type vehicle which can prevent foreign substances from entering an air intake port of an air cleaner even when the air cleaner is arranged at a position out of protection of the vehicle body cover. An air intake port cover covers the air intake port of the air cleaner and also covers a cooling air suction port of the power unit. The leakage of suction sound from the cooling air suction port can be prevented simultaneously.