In addition to the pole outside the guide of through in the [challenge] the drawing board fishing rod, invisible openings having a function of protecting the edge of the opening, high reinforcement force, to provide an opening reinforcement tool. A through an opening portion reinforcing tool 2 of the drawing board fishing rod in, put your feet 3 to sturdily can cap, also attach the Saogai guide 6, the opening when covering the opening the part was excised to be on top of, there to attach the removable cap 5, eliminating visible openings, was the appearance in the cap-shaped.FIELD 5【課題】中通し振り出し釣り竿の竿外ガイドの他に、開口部を見えなくし開口部の縁を保護する機能を持つ、補強力の高い、開口部補強用具を提供する。【解決手段】中通し振り出し釣り竿の開口部補強用具2であって、頑丈に出来たキャップに足3を付け、また竿外ガイド6を取り付けて、開口部に被せた時開口部の上になる部分を切除し、そこに着脱式キャップ5を取り付け、開口部を見えなくし、外観をキャップ状にした。【選択図】図5
