A guide wire assembly ( 1 ) includes a guide wire ( 2 ) having a main body section ( 22 ), a front-end angular section ( 21 ) and a base-end angular section ( 23 ). The guide wire assembly ( 1 ) further includes a storage section for storing the guide wire ( 2 ) inside a hollow section of a substantially annularly wound pipe body ( 51 ). The base-end angular section ( 23 ) is arranged so that it is dynamically stabilized in elasticity, in a state in which a bent direction thereof is aligned with a direction of curvature of the pipe body ( 51 ). When the base-end angular section ( 23 ) passes through the pipe body as the guide wire ( 2 ) is delivered from the storage section ( 5 ), a state is maintained in which the bent direction of the base-end angular section ( 23 ) is aligned with the direction of curvature of the pipe body ( 51 ), and the direction of the front-end angular section ( 21 ) is maintained at a predetermined direction with respect to the storage section ( 5).
