An object of the present invention is to provide a highly safe guidewire 1 by increasing the bonding strength between a core shaft 2 and a coiled body 3 of the guidewire 1. The guidewire 1 includes the core shaft 2, and the coiled body 3 wound around the outer circumferential surface of the core shaft 2. A bulged portion 5 is provided at the tip portion of the core shaft 2. The front end of the coiled body 3 is bonded to the front end of the core shaft 2 with a bonding portion 6. The bonding portion 6 is provided to enclose the bulged portion 5 provided at the tip portion of the core shaft 2.
