| CPC B01L 7/52 (2013.01) [B01L 2300/0832 (2013.01)] | 15 Claims |

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1. A PCR tube comprising:
an outer tube configured to provide a first space having a blocked lower portion; and
an inner tube inserted to the first space,
wherein the inner tube comprises:
an inner tube body configured to provide a second space; and
a spiral structure protruding from a side surface of the inner tube body to the outside of the inner tube body,
wherein a micro-channel is defined by the outer tube, the inner tube body, and the spiral structure in a state in which the inner tube is inserted into the first space.
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