A stent insertion apparatus including a guide member in which a fixing part is formed includes a guide member configured to guide movement of a first stent inserted into a human body along a first guide wire inserted into a main area of stenosis to be installed in the main area of stenosis, wherein the guide member includes a fixing part configured to fix a leading end portion of a guide tube into which a second guide wire for installing a second stent is inserted, the second stent being inserted into a branched area of stenosis, which branches from the main area of stenosis, to be installed in the branched area of stenosis.
