The present invention relates to a rail management device. The rail management device may comprise: a measurement unit which is a device for measuring the cross-sectional profile of a rail comprising a base portion, a web portion, and a head portion, and measures the top profile and flank profile of the head portion; and a securing unit which is fixed to the rail and supports and secures the measurement unit, wherein the securing unit comprises: a body which is connected to the measurement unit; an elastic clamp which is provided at the bottom of the body and is brought into close contact with the upper surface of the head portion; an invariable clamp which is provided at one side of the body and is brought into close contact with the lower surface of one side of the head portion; and a variable clamp which is provided at the other side of the body and is brought into close contact with the lower surface of the other side of the head portion.