Abstract: An orthotic for correcting a movement of a hip joint of a user includes a support frame, a cam, a leg fixer, a following element and a restoring element. The support frame is attached to the user. The cam is disposed to the support frame. The leg fixer is pivotally connected to the support frame. The following element is moveably mounted on the leg fixer and connected to the cam. The restoring element connected to the leg fixer provides a force of restoring the leg fixer when the leg fixer is moved. When the leg fixer is being moved, a predetermined relative movement between the cam and the following element is produced to correct a movement range of the hip joint.