PROBLEM TO BE SOLVED: To provide a pruning machine capable of improving durability with a simple structure while retaining cutting quality of a pruning blade. SOLUTION: This pruning machine (1) has reciprocating a pair of blades (10 and 12) having a plurality of pruning blades (8) relatively along the longitudinal direction (A1). The external parts (10b and 12b) of the pair of the blades (10 and 12) extending in the longitudinal direction (A1) from a housing (4) have screws (64d) which passes through the pair of the blades (10 and 12) and a pair of holding members (44 and 64c), and a plurality of adjustable regulating parts (64) which adjustably regulates a space (L2-W1) between the pair of the blades (10 and 12). Furthermore, the external parts (10b and 12b) have a piercing member (66c) which passes through a pair of the blades (10 and 12) and a pair of holding members (44, 46 and 66d), and a cross direction regulating part (66) which suppresses movement in the cross direction (B1) of the pair of the blades (10 and 12). COPYRIGHT: (C)2008,JPO&INPIT