To provide a sample holder which supports a plurality of samples easy to be attached and detached, at the arbitrary height in a stirring tank in a floating ore dressing machine.SOLUTION: The present invention includes a bottomed container (10) in an open form capable of accommodating a plurality of different samples (1 to 3) separately; a vertical coupling support bar (20) capable of vertically aligning the bottom surfaces (16) vertically in a vertical direction; a connecting cylinder (30) attached to an outer wall (M) of the bottomed container (10) capable of loosely fitting it in accordance with the inner diameter equal to or larger than the outer diameter (D); a connecting threads (40) loosely fitted by penetrating in piercing manner vertically with the vertical coupling support bar (20) connecting a plurality of bottomed containers (10) having the connecting cylinder (30) connected to each other, and a vertical coupling support rod (20) includes a hookable part (21) which can be hooked at the upper edge of a liquid tank forming a floating ore dressing machine.SELECTED DRAWING: Figure 2
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