A device for moving a lower jaw forward, comprising: an upper teeth mounting portion on which upper teeth of a human body are mountable; a lower teeth mounting portion on which lower teeth of the human body are mountable; a sensing portion comprising a posture sensor capable of sensing a posture of a human body; and a driving portion capable of advancing the lower teeth mounting portion relative to the upper teeth mounting portion or retreating the advanced lower teeth mounting portion to the upper teeth mounting portion, according to a sensing result of the sensing portion, characterized in that the sensing portion further comprises a snoring sensor for sensing snoring and the posture sensor being configured for sensing a sleeping posture of the human body, wherein when the snoring sensor senses snoring, the sensing portion is capable of sensing a sleeping posture of a human body, wherein the driving portion includes a power portion configured to provide a force for moving the lower teeth mounting portion and a connection portion connecting the power portion to the lower teeth mounting portion, wherein the connection portion includes a connecting rod connecting the upper teeth mounting portion and the lower teeth mounting portion, one end of the connecting rod being hingedly coupled to the lower teeth mounting portion or the upper teeth mounting portion, wherein the power portion includes a rotating portion fixedly coupled to the connecting rod and a rotational power providing portion coupled to the rotating portion via a rotation transfer shaft and capable of providing rotational power to the rotating portion, such that the lower teeth mounting portion is moved relative to the upper teeth mounting portion by rotation of the connecting rod with respect to the rotation transfer shaft, and wherein before the sensing portion senses a sleep disorder of the human body, the lower teeth mounting portion is movable freely with respect to the upper teeth mounting portion, and when the sensing portion senses the sleep disorder and the changes of the sleeping posture, the driving portion is capable of advancing the lower teeth mounting portion with respect to the upper teeth mounting portion and maintains a moved state until the sensing portion senses a next sensing result. an upper teeth mounting portion on which upper teeth of a human body are mountable; a lower teeth mounting portion on which lower teeth of the human body are mountable; a sensing portion comprising a posture sensor capable of sensing a posture of a human body; and a driving portion capable of advancing the lower teeth mounting portion relative to the upper teeth mounting portion or retreating the advanced lower teeth mounting portion to the upper teeth mounting portion, according to a sensing result of the sensing portion, characterized in that the sensing portion further comprises a snoring sensor for sensing snoring and the posture sensor being configured for sensing a sleeping posture of the human body, wherein when the snoring sensor senses snoring, the sensing portion is capable of sensing a sleeping posture of a human body, wherein the driving portion includes a power portion configured to provide a force for moving the lower teeth mounting portion and a connection portion connecting the power portion to the lower teeth mounting portion, wherein the connection portion includes a connecting rod connecting the upper teeth mounting portion and the lower teeth mounting portion, one end of the connecting rod being hingedly coupled to the lower teeth mounting portion or the upper teeth mounting portion, wherein the power portion includes a rotating portion fixedly coupled to the connecting rod and a rotational power providing portion coupled to the rotating portion via a rotation transfer shaft and capable of providing rotational power to the rotating portion, such that the lower teeth mounting portion is moved relative to the upper teeth mounting portion by rotation of the connecting rod with respect to the rotation transfer shaft, and wherein before the sensing portion senses a sleep disorder of the human body, the lower teeth mounting portion is movable freely with respect to the upper teeth mounting portion, and when the sensing portion senses the sleep disorder and the changes of the sleeping posture, the driving portion is capable of advancing the lower teeth mounting portion with respect to the upper teeth mounting portion and maintains a moved state until the sensing portion senses a next sensing result.