The present invention relates to a washable straw and, more specifically, to a straw capable of being washed after being used for drinking a beverage, by sealing or opening the lateral side of a side body by circularly rolling side bodies, connected by connective joints, or an integrally formed side body. The washable straw includes: side bodies having a predetermined thickness, and formed so as to be long in the vertical direction; connective joints made of a flexible material, and allowing the side bodies to be rolled by joining the side bodies; and a detachment means provided at both of the outermost side bodies among the side bodies connected by the connective joint so as to detach both side bodies, wherein a closely adhered state in which both side bodies overlap by rolling the plurality of side bodies is maintained.
