A steering device according to the present invention has: a column pipe; a hanger bracket; an outer column that covers the column pipe in such a manner that the column pipe can move in a front-back direction; a fixed bracket that sandwiches the outer column; a fastening tool that has a bolt shaft and an operation lever portion, is inserted into a long hole of the hanger bracket, and locks and unlocks the outer column and the fixed bracket; a stopper member that is provided in the bolt shaft and swings as the bolt shaft rotates; and a telescopic regulating member that moves in the front-back direction together with the column pipe. The stopper member is capable of coming into abutment with the telescopic regulating member in an unlocked state but is not capable of coming into abutment with the telescopic regulating member in a locked state.