A linear object manipulation assisting device is provided which allows easy manipulation of a linear object. A wire manipulation assisting device as a linear object manipulation assisting device assists manipulation of a delivery wire penetrating through a Y connector. The Y connector includes a main branch through which the delivery wire penetrates, and a side port that branches off from the main branch. A microcatheter having the delivery wire inserted therein is connected to one end of the main branch. The wire manipulation assisting device includes a fixing portion for fixing the Y connector and a placement portion attached to the fixing portion. A portion of the delivery wire that protrudes from the other end of the main branch can be manipulated with at least the first and second fingers of the right hand with the carpal portion of the right hand being placed on the placement portion.
