A tissue suturing system according to the present invention includes a pushing tool having a rod-like shaft portion and a linear portion including a pressing portion connected to the shaft portion and extending in the longitudinal direction, and a pushing member configured to be introduced into the hollow organ A suction device, and a suturing device configured to be able to suture the luminal organ.本発明に係る組織縫合システムは、棒状のシャフト部と、シャフト部に接続されて長手方向に延びる押圧部を含む線状部とを有する押し込み具と、管腔臓器内に導入可能に構成された吸引装置と、管腔臓器を縫合可能に構成された縫合器とを備える。