A cabin for a work vehicle, comprising: a ceiling portion; an air conditioner provided to the work vehicle; an air distribution duct provided to the ceiling portion for communicating conditioned air from the air conditioner to the cabin; an air guide projecting into the air distribution duct at an intermediate portion of the duct and forming an inlet opening in a lateral face of a projecting portion of the air guide; and an outlet portion extending to outside the duct and having an opening for introducing the conditioned air from the inlet opening into the cabin. The air guide is pivotable between a use condition and a non-use condition where the inlet opening is oriented differently from an orientation of the inlet opening when the air guide is in the use condition. The air guide is pivotable about an axis such that the inlet opening of the air guide assumes an upstream orientation with respect to a direction of air flow within the air distribution duct when the air guide is in the use condition whereas the inlet opening of the air guide assumes a downstream orientation with respect to the direction of air flow within the air distribution duct when the air guide is in the non-use condition.