A preparative purification apparatus which comprises a plurality of trap columns (190a-190e) connected in parallel, and which is adapted to cause a solution eluted from a liquid chromatograph to flow through a trap column (190a-190e) of the plurality of trap columns (190a-190e) to capture a target component contained in the solution in the trap column (190a-190e), and thereafter, causes an elution solvent different from a mobile phase of the liquid chromatograph to flow through the trap column (190a-190e) to elute the target component from the trap column (190a-190e), the apparatus comprising: a) a liquid feeding unit (240, 440) which feeds the elution solvent to an inlet of the trap column (190a-190e); b) a flow path switching unit (200, 400) which selectively connects an outlet of the trap column (190a-190e) to one of a waste liquid flow path (202, 402) and a recovery flow path (201, 401); c) a liquid feed amount measurement unit (240a, 440a) which measures an amount of the elution solvent fed to the trap column (190a-190e) by the liquid feeding unit; and d) a flow path control unit (260a, 460a) which controls the flow path switching unit (200, 400) to connect the outlet of the trap column (190a-190e) to the recovery flow path (201, 401) at a timing when the amount of the elution solvent fed to the trap column (190a-190e), which is measured by the liquid feed amount measurement unit (240a, 440a) and, reaches a predetermined initial waste liquid amount, and thereafter, to connect the outlet of the trap column (190a-190e) to the waste liquid flow path (202, 402) at a timing when the amount of the elution solvent fed to the trap column (190a-190e), which is measured by the liquid feed amount measurement unit (240a, 440a), reaches a predetermined solution recovery amount, wherein the mobile phase and the elution solvent in a mixing ratio determined by the predetermined initial waste liquid amount and the predetermined solution recovery amount are recovered from the recovery flow path (201, 401) without performing an evaporation and dryness process, and wherein, when the target components captured in the respective trap columns (190a-190e) are sequentially eluted and recovered into individual recovery containers (250, 450), the flow path control unit (260a, 460a) is adapted to make the mixing ratio of the mobile phase and the elution solvent recovered for each type of target component captured in each trap column (190a-190e) constant, by setting the predetermined initial waste liquid amount and the predetermined solution recovery amount to the same values for the types of the target components captured in the respective trap columns (190a-190e). a) a liquid feeding unit (240, 440) which feeds the elution solvent to an inlet of the trap column (190a-190e); b) a flow path switching unit (200, 400) which selectively connects an outlet of the trap column (190a-190e) to one of a waste liquid flow path (202, 402) and a recovery flow path (201, 401); c) a liquid feed amount measurement unit (240a, 440a) which measures an amount of the elution solvent fed to the trap column (190a-190e) by the liquid feeding unit; and d) a flow path control unit (260a, 460a) which controls the flow path switching unit (200, 400) to connect the outlet of the trap column (190a-190e) to the recovery flow path (201, 401) at a timing when the amount of the elution solvent fed to the trap column (190a-190e), which is measured by the liquid feed amount measurement unit (240a, 440a) and, reaches a predetermined initial waste liquid amount, and thereafter, to connect the outlet of the trap column (190a-190e) to the waste liquid flow path (202, 402) at a timing when the amount of the elution solvent fed to the trap column (190a-190e), which is measured by the liquid feed amount measurement unit (240a, 440a), reaches a predetermined solution recovery amount, wherein the mobile phase and the elution solvent in a mixing ratio determined by the predetermined initial waste liquid amount and the predetermined solution recovery amount are recovered from the recovery flow path (201, 401) without performing an evaporation and dryness process, and wherein, when the target components captured in the respective trap columns (190a-190e) are sequentially eluted and recovered into individual recovery containers (250, 450), the flow path control unit (260a, 460a) is adapted to make the mixing ratio of the mobile phase and the elution solvent recovered for each type of target component captured in each trap column (190a-190e) constant, by setting the predetermined initial waste liquid amount and the predetermined solution recovery amount to the same values for the types of the target components captured in the respective trap columns (190a-190e).