A neck collar is provided, including: a neck sleeve； a chin support, swingably connected to the neck sleeve； an adjustment mechanism, including at least one linking member and at least one driving member with which the linking member is co-movably connected, each of the at least one linking member being movably connected to the neck sleeve and movably abutted against the chin support, the at least one driving member being externally operable and adjustable to drive the at least one linking member to move relative to the neck sleeve and to move relative to the chin support, simultaneously, between a first position and a second position； wherein when the at least one linking member is moved from the first position toward the second position, the at least one linking member drives the chin support to swing upwardly relative to the neck sleeve.本發明關於一種護頸圈，包括：一頸套；一下巴托片，可相對樞擺地設於該頸套；一調整機構，包括至少一連動件及至少一可帶動該至少一連動件之帶動件，各該連動件可移動地連接於該頸套且可移動地與該下巴托片抵接，該至少一帶動件可供外部調整地帶動該至少一連動件同時相對該頸套及該下巴托片移動於一第一位置及一第二位置之間；其中，當該至少一連動件由該第一位置朝該第二位置移動時，該至少一連動件致動該下巴托片相對該頸套朝上擺動。
