Abstract: A cervical vertebrae orthosis. An angle of the orthosis can always be easily adjusted, rapidly and securely, and a lower jaw holding body and an occipital region holding body can always be supported stably. An angle adjusting device (53) of the cervical vertebrae orthosis is structured by coaxially pivoting a clutch member (54) with a radial pawl (56) fixed and attached to a thoracic cage body (1), a lower jaw holding body (6) and an occipital region holding body (8). A clutch portion (60) with a pawl (62) is formed in connection arms (51) and (52) so as to be engaged with the clutch member (54). A stopper ring (63) with an operation pawl (66) is attached to the connection arms (51) and (52) so as to engage the clutch member (54) with the clutch portion (60) and fix them. A holding member (76) with an operation pawl (80) is provided so as to engage with and press to operate the operation pawl (66) of the stopper ring (63).

Abstract: To provide a cervical vertebrae orthosis in which an angle can be adjusted always easily, rapidly and securely, and a lower jaw holding body and an occipital region holding body can be supported always stably, an angle adjusting means (53) of a cervical vertebrae orthosis is structured by coaxially pivoting a clutch member (54) with a radial pawl (56) fixed and attached to each of a thoracic cage body (1), a lower jaw holding body (6) and a occipital region holding body (8), a clutch portion (60) with the same shaped pawl (62) formed in connection arms (51) and (52) so as to be engaged with the clutch member (54), a stopper ring (63) with an operation pawl (66) attached to the connection arms (51) and (52) so as to engage the clutch member (54) with the clutch portion (60) and fix them, and a holding member (76) with an operation pawl (80) provided so as to engage with and press to operate the operation pawl (66) of the stopper ring (63).