An air-conditioned clothing for use with a helmet which can be used when the helmet is worn as well as when the helmet is not worn, includes a clothing main body, at least one fan, an air blow-out unit, a guide sheet and an attachment unit. The air is made to flow through an air flow path by the at least one fan and the flowing air evaporates sweat coming out from a body to cool the body with heat of evaporation and in a case where the helmet is worn, the air which blows out from the air blow-out unit is guided to the helmet by the guide sheet and taken into the helmet from an air intake which is formed between an inner edge of the helmet and the head of the user in order to circulate the air inside the helmet.