The present invention provides a fixing member that can easily fix a fixing base and a storage box for fixing a wiring / piping material device to a columnar body. A columnar body P surrounded by a pair of arm portions being brought close to each other by a bolt body 6 is fastened, and a fixing member 1 is attached to the columnar body P. The bolt body 6 is used to support a fixed body 4 such as a fixed base or a storage box. [Selection] Figure 5【課題】柱状体に対して配線・配管材用機器を固定する固定台座や収納函を、簡単に固定できる固定部材を提供する。【解決手段】ボルト体6で一対の腕部を近接させることで取り囲んだ柱状体Pを締め付け、固定部材1を柱状体Pに取着する。そのボルト体6を利用して、固定台座や収納函等の被固定体4を支持させる。【選択図】図5