PROBLEM TO BE SOLVED: To achieve firm, stable and unnoticeable fixation regardless of the number of legs of supporting unit by forming semicircle dents, and to easily form the semicircle dents in a log.SOLUTION: In the method, wherein the semicircle dent to which a standing tree is fitted and the semicircle dent provided near both ends or the upper end of a column are tied with a horizontal tree for supporting the standing tree comprising boulevard trees with a rope or cord, or a belt or something other than the standing tree is fastened with a bolt nut, natural warmth is created by a natural or false tree, and the standing tree and the horizontal tree are fitted as well as make a line contact at worst, each other. Thus, the horizontal tree and the column make a surface contact, achieving more stable support. In addition, the supporting unit is sunk into the semicircle dent, and becomes unnoticeable, making the standing tree relatively noticeable.COPYRIGHT: (C)2013,JPO&INPIT【課題】半円状窪みを形成することで、支持手段の足の数に係わらず強固に安定良く、かつ余り目立たずに固定可能とし、また丸太に半円状窪みを容易に形成可能とする。【解決手段】並木などにする立ち木を支持する水平木に、立ち木を嵌入させる半円状窪みと、その両端寄り又は支柱の上端寄りに設けた半円状窪みを、嵌入状態に縄や紐で縛るか又はベルト若しくは立ち木以外をボルトナットで締め付ける方法によると、天然木や擬木で自然な温かみを醸し出すことができ、しかも立ち木と水平木が嵌入状態となるだけでなく、最悪でも線接触となり、水平木と支柱とは面接触となるので、支持がより安定する。加えて、半円状窪みに沈んで、支持手段が目立たなくなるので、相対的に立ち木を目立たせる事かできる。【選択図】図4