Abstract: A portable shower mountable on a van or similar vehicle wherein a shower curtain is hung from a U-shaped frame which is adjustable in width and telescopes inwardly into parallel tubes mounted near opposite lengthwise rain gutters of a van roof. The parallel tubes are held in place by cross-tensioned straps, pulling against brackets secured to the rain gutters. An opaque shower curtain is suspended from the U-shaped frame by snap fasteners and has a lengthwise slide fastener near one end of the curtain for ingress and egress into the room formed by the curtain. A removable shelf is supported in the room from the rain gutter and supports a water bottle in proximity to the gutter for showering. A fabric self-supporting shower pan is provided over the ground beneath the shelf with the forward end of the pan hung by hooks from the rear bumper of the vehicle for draining the pan into a receptacle.