Abstract: A portable horse stall of modular construction providing various sizes and numbers of stalls which can be quickly erected using interchangable tubular wall frames. The interchangable wall frames include side wall frames, center wall frames, and front wall frames which are pinned together through the use of tubular sleeves and pins. The wall frames have a flexible padding disposed inside the frame and between the inner and outer sides thereof. The padding is enclosed by a tough, flexible, vinyl coated polyester weave fabric. The padding and flexible fabric provide insulation for the stall and a shock resistant cushion to protect the legs of a horse housed therein should the horse be inclined to kick the wall frames.