An above-ground, compact, multi-purpose pool, particularly for practicing stationary swimming has three portions that make up a compact unit or are arranged so as to be assembled to form a compact unit. The three portions include a pool capable of containing a volume of water and comprising a bottom, two longitudinal walls, and two end walls; a dressing/undressing and/or showering cabin placed on one side of the pool; and a chamber placing said cabin in communication with the pool. The chamber includes an upper space mounted on the portion of the pool that is adjacent to said cabin, as well as two side walls, a front wall, and a covering wall. The front wall has an opening in communication with the free space above the pool, wherein the opening is provided with a door.