Test tube

The utility model provides a test tube which comprises a tube body, a tube cover and a tube cover, the test tube plug is plugged at the opening; the locking structure comprises a limiting structure arranged on the outer side wall of the tube body and a rotating part arranged on the test tube plug, the rotating part is provided with a matching structure matched with the limiting structure, the rotating part has a locking position and an unlocking position, and under the condition that the rotating part rotates to the locking position, the rotating part can be locked and unlocked. At least part of the limiting structure is stopped above the matching structure, and under the condition that the locking structure is located at the unlocking position, the limiting structure rotates away from the position above the matching structure. By applying the technical scheme, the problem that the test tube cover of the test tube in the prior art is easy to fall off can be effectively solved. 本实用新型提供了一种试管，包括：管本体，管本体的上部具有开口；试