A seatbelt device having a first energy absorbing member with two axial direction end portions attached respectively to a spindle and a lock member and which absorbs energy by undergoing twisting deformation when a load of at least a predetermined value acts on the spindle while the lock member is locked during an emergency. A second energy absorbing member is fixed to the spindle at one end portion and extends through a bend route provided in the lock member. The second energy absorbing member absorbs energy by being pulled through the bend route so as to undergo plastic deformation when the spindle rotates as a result of twisting of the first energy absorbing member. A deformation portion is interposed between a turned back portion of the second energy absorbing member and the spindle. With this constitution, unstable load variation can be suppressed in an initial stage of an operation, and as a result, a stable tension can be applied to a webbing such that an occupant can be protected effectively and safely.