A steering device comprising: a cylindrical inner column that supports an input shaft connected to a steering wheel so as to allow the input shaft to be rotatable; a cylindrical outer column into which at least a part of the inner column is inserted; and a cylindrical lower column that supports an output shaft connected to the input shaft so as to allow the output shaft to be rotatable and is supported by a dash panel, a first hole that is provided in the inner column; a first slit of the outer column that is formed by notching one end of the outer column, the one end being a side into which the inner column is inserted; and an outer column bracket that is fixed to a vehicle body-side member and clamps and supports the outer column together with holding force-increasing members, wherein the lower column moves to a rear side by a distance at the time of a primary collision, and the inner column and the outer column move relative to each other at the time of a secondary collision, and wherein an inner wall of the outer column is in contact with an outer wall of the inner column in a state in which the outer column is clamped, and a telescopic position of the inner column is adjustable in a state in which the clamping of the outer column is released, characterized in that the steering device further comprises: an inner column bracket which is supported by the holding force-increasing members and in which a second hole is formed, wherein the inner column bracket includes insertion portions, and the insertion portions are inserted into holes provided in holding force-increasing members so that the inner column bracket is supported; and a shear pin that connects the inner column bracket to the inner column at a position across the first and second holes (51h, 43h) so that the inner column bracket and the inner column are detachable from each other. a cylindrical inner column that supports an input shaft connected to a steering wheel so as to allow the input shaft to be rotatable; a cylindrical outer column into which at least a part of the inner column is inserted; and a cylindrical lower column that supports an output shaft connected to the input shaft so as to allow the output shaft to be rotatable and is supported by a dash panel, a first hole that is provided in the inner column; a first slit of the outer column that is formed by notching one end of the outer column, the one end being a side into which the inner column is inserted; and an outer column bracket that is fixed to a vehicle body-side member and clamps and supports the outer column together with holding force-increasing members, wherein the lower column moves to a rear side by a distance at the time of a primary collision, and the inner column and the outer column move relative to each other at the time of a secondary collision, and wherein an inner wall of the outer column is in contact with an outer wall of the inner column in a state in which the outer column is clamped, and a telescopic position of the inner column is adjustable in a state in which the clamping of the outer column is released, characterized in that the steering device further comprises: an inner column bracket which is supported by the holding force-increasing members and in which a second hole is formed, wherein the inner column bracket includes insertion portions, and the insertion portions are inserted into holes provided in holding force-increasing members so that the inner column bracket is supported; and a shear pin that connects the inner column bracket to the inner column at a position across the first and second holes (51h, 43h) so that the inner column bracket and the inner column are detachable from each other. an inner column bracket which is supported by the holding force-increasing members and in which a second hole is formed, wherein the inner column bracket includes insertion portions, and the insertion portions are inserted into holes provided in holding force-increasing members so that the inner column bracket is supported; and a shear pin that connects the inner column bracket to the inner column at a position across the first and second holes (51h, 43h) so that the inner column bracket and the inner column are detachable from each other.