A front part structure of a vehicle cabin may include: an instrument panel including an air outlet at an end of the instrument panel on a passenger seat side; an air conditioner main body arranged inside the instrument panel at a center in a vehicle width direction; a cross beam arranged inside the instrument panel and connected to a right side and a left side of a vehicle body; and an air duct arranged inside the instrument panel and connecting the air conditioner main body to the air outlet. The air duct may extend in front of the passenger seat at a height lower than the cross beam.