A guide wire (10, 70, 80, 90, 100) for guiding a tubular elongated body to be inserted into a living body, the guide wire (10, 70, 80, 90, 100) comprising: an elongated shaft portion that has flexibility; a puncture portion that is disposed at a distal end portion of the shaft portion and configured to form a hole in a biological tissue; and a cover portion that is elastically deformable and covers the puncture portion, wherein the cover portion includes a sparse pitch portion that has a wire member wound in a spiral shape and is contractible along a central axis of winding, and a distal end cover that is located on a distal end side of the sparse pitch portion and is capable of covering at least a part of the puncture portion, the shaft portion or the puncture portion includes a first contact portion, the distal end cover includes a second contact portion located on a proximal end side with respect to the first contact portion, and relative movement of the first contact portion and the second contact portion in an axial direction is restricted by the first contact portion coming into contact with the second contact portion; wherein the cover portion includes a distal end cover that is not deformable along the central axis on the distal end of a portion of the sparse pitch portion that is deformable along the central axis, and either, the first contact portion is disposed at the distal end portion of the shaft portion and is located at a large-diameter portion having an outer diameter larger than that of the proximal end side, or, alternatively, the first contact portion is located at a proximal portion of the puncture portion; characterized in that the distal end cover has, on an inner peripheral surface thereof, a stepped portion that approaches the central axis, the second contact portion is located at the stepped portion, the stepped portion is formed on an inner peripheral surface of the distal end cover over an entire circumference. an elongated shaft portion that has flexibility; a puncture portion that is disposed at a distal end portion of the shaft portion and configured to form a hole in a biological tissue; and a cover portion that is elastically deformable and covers the puncture portion, wherein the cover portion includes a sparse pitch portion that has a wire member wound in a spiral shape and is contractible along a central axis of winding, and a distal end cover that is located on a distal end side of the sparse pitch portion and is capable of covering at least a part of the puncture portion, the shaft portion or the puncture portion includes a first contact portion, the distal end cover includes a second contact portion located on a proximal end side with respect to the first contact portion, and relative movement of the first contact portion and the second contact portion in an axial direction is restricted by the first contact portion coming into contact with the second contact portion; wherein the cover portion includes a distal end cover that is not deformable along the central axis on the distal end of a portion of the sparse pitch portion that is deformable along the central axis, and either, the first contact portion is disposed at the distal end portion of the shaft portion and is located at a large-diameter portion having an outer diameter larger than that of the proximal end side, or, alternatively, the first contact portion is located at a proximal portion of the puncture portion; characterized in that the distal end cover has, on an inner peripheral surface thereof, a stepped portion that approaches the central axis, the second contact portion is located at the stepped portion, the stepped portion is formed on an inner peripheral surface of the distal end cover over an entire circumference. the distal end cover has, on an inner peripheral surface thereof, a stepped portion that approaches the central axis, the second contact portion is located at the stepped portion, the stepped portion is formed on an inner peripheral surface of the distal end cover over an entire circumference.