Test tube rack

The utility model discloses a test tube rack. The test tube rack comprises a bottom plate, the protection plate is arranged above the bottom plate and is parallel to the bottom plate, and through holes distributed in a matrix mode are formed in the protection plate; the expansion sleeves are arranged below the through holes of the protection plate and are coaxial with the through holes; the expansion sleeve is provided with a plurality of elastic strips arranged in the circumferential direction, and an inner hole capable of conducting elastic expansion is defined by the plurality of elastic strips. Before expansion, the hole diameter of the inner hole of the expansion sleeve is smaller than that of the through hole; and the test tube is used for sequentially penetrating through the through hole of the protection plate and the inner hole of the expansion sleeve. According to the test tube rack provided by the utility model, by virtue of the characteristic that the expansion sleeve can adaptively wrap the test