A steering device includes: a steering shaft (3) and a column jacket (4) that are telescopically adjustable in an axial direction; a lock plate (42) provided with a plurality of holes (57); a support shaft (39) that extends in a cross direction crossing the axial direction and includes a low-strength portion (74) to be broken when a load acts on the steering shaft (3) and the column jacket (4); and a lock member (40) that advances to the lock plate (42) to be engaged with one of the holes (57). The lock member (40) is disengaged from the one of holes (57) when the support shaft (39) is broken in a state in which the lock member (40) is engaged with the one of the holes (57).
