Disclosed is a retractor for a thoracic surgery. The retractor for a thoracic surgery can be bent since a body of the retractor consists of a first bending unit, a second bending unit, and a third bending unit, thus a silicon body can be bent and used within a narrow surgical space. First and second locking units are included and can be selectively used depending on a surgical part, thereby remarkably increasing user inconvenience. In addition, the retractor can: greatly enhance a surgical view of a surgeon by widening a surgical part, as the surgical part can be firmly hung without being slid by using the first and second locking units; and prevent the surgical part to be hung from being ripped or damaged. The retractor for a thoracic surgery comprises: a core unit (10) composed of a first bending unit (11), a second bending unit (12) vertically extending from the first bending unit (11), and a third bending unit (13) horizontally extending from the second bending unit (12) and positioned corresponding to the first bending unit (11), and including an insert core unit (14) on one side thereof and a locking core unit (15) on the other side; a silicon body (20) covering the outer circumferential portion of the core unit (10); a first locking unit (21) extending from one side of the silicon body (20) and covering the insert core unit (14) of the core unit (10); and a second locking unit (22) extending from the other side of the silicon body (20) and covering the locking core unit (15) of the core unit (10).
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