Safe enough to allow partial penetration into the tissue, thereby avoiding full thickness penetration of the tissue, and still allow secure fixation and easy removal of the instrument while maintaining normal GI tract function A tissue anchoring device in the form of a microanchor. [Selection] Figure 1B部分的に組織へ貫入し、それによって組織の全厚み貫入を回避し、更に正常なGI管の機能を維持しながら器具の確実な固定及び器具の容易な取外しを可能にするのに充分に安全な、マイクロアンカーの形式の組織固定器具。【選択図】図1B