To reduce stress acting on the surrounding of a through-hole of a column with a steering lock device attached thereto, in a steering device equipped with the steering lock device.

Slight gaps are formed in a vehicle body vertical direction between an outer peripheral surface of a lock pin 66 and the through-hole 45 and between a guide groove 46 and an engagement protrusion 65, and thereby force is not exerted on the through-hole 45, and the force is received only by a flange part 43, ribs 432 and 433, a flange part 44, and ribs 442 and 443. The engagement protrusion 65 is not fitted into the through-hole 45. Because it is enough for the through-hole 45 to be big enough to allow entering and exiting of the lock pin 66, which has a smaller cross-sectional area than the engagement protrusion 65, the surface area of the through-hole 45 can be smaller, making it possible to increase the strength of the outer column 4.