A fixing device is applied to fix a breathing tube which includes a free segment located outside a patient, and the fixing device contains: an adjustable collar, a connector, and a fixer. The adjustable collar surrounds a limb of the patient, and the adjustable collar includes a first part and a second part opposite to the first part. The connector connects with the adjustable collar, wherein the first part and the second part of the adjustable collar respectively insert through the connector. The fixer includes a base mounted on the connector and includes two arms extending outwardly from the base so that the free segment of the breathing tube is clamped by the two arms.一種醫療用呼吸管路的固持裝置,醫療用呼吸管路具有位在患者體外的自由段,固持裝置包括一能繞在患者肢體上的調整件、一連接件,以及一固持件。調整件具有相對的第一端及第二端,調整件的第一端與第二端分別可活動地穿過連接件。固持件具有一設置在連接件上的基座,以及二由基座向外相對延伸的夾臂,使醫療用呼吸管路的自由段能被該二夾臂所夾持。1‧‧‧固持裝置11‧‧‧調整件111‧‧‧第一端112‧‧‧第二端12‧‧‧連接件123‧‧‧連接本體127‧‧‧按壓部13‧‧‧固持件131‧‧‧基座132‧‧‧夾臂
