FILE MADE OF RESIN

PROBLEM TO BE SOLVED: To provide a file made of resin which is excellent in external appearance, strength, handling properties and also properties of disposal and recycling properties, easy to manufacture and excellent also in the cost and further enables improvement of the convenience on the occasion of an operation for binding paper. SOLUTION: This file is equipped with a file main body 10, a main-part binding piece 21 and a subordinate-part binding piece 25. The subordinate-part binding piece 25 has an engaging part which is connected rotatably to the file main body 10 and also engages disengageably with an auxiliary binding piece 30. The auxiliary binding piece 30 is molded of an elastic material of resin. When the auxiliary binding piece 30 is displaced by an engaging projection with the rotation of the subordinate-part binding piece 25, a force of elasticity is accumulated in the auxiliary binding piece 30. The auxiliary binding piece 30 springs up due to the accumulated force of elasticity after it is disengaged from the engaging part.