A cervical collar device is provided, including a neck seat, including an upper neck seat portion, a lower neck seat portion and a connection portion, two opposite sides of the connection portion being respectively integrally connected to the upper neck seat portion and the lower neck seat portion, the connection portion having a seam； an adjustment device, including a lower support portion and an upper support portion which is movably connected to the lower support portion, the upper support portion being connected to the upper neck seat portion, the lower support portion being connected to the lower neck seat portion, the upper support portion having at least one first adjusting portion, the lower support portion having at least one second adjusting portion, the at least one first adjusting portion being movably positioned on the at least one second adjusting portion.
