The invention concerns an intra-line fishing rod which can both reduce the insertion resistance of a fishline and maintain a delicate flexible property. In the intra-line fishing rod with an inserted fishline, the inside diameter of the respective portions (a, b, c) of the top rod portion of the fishing rod is formed in a substantially straight shape having an inclination of 3/1000 or less, and reinforcing fibers having different elastic moduli are used in the rod top portions and are sequentially arranged in such a manner not only that the reinforcing fibers extend substantially in the axial direction of the rod top portions but also that the elastic moduli become higher in a geometric series manner from the front portion (a) toward the rear portion (c).