A telescopic device which can reduce production cost while exhibiting good productivity. The telescopic device (12) comprises a first tubular body (16), a second tubular body (17) inserted movably into the first tubular body (16), and a third tubular body (18) inserted movably into the second tubular body (17). The telescopic device (12) has a means (22) for regulating movement of the third tubular body (18) for the second tubular body (17). The regulation means (22) has a regulation body (31) projecting from an inner hole portion (26) to the outside of the third tubular body (18) by movementin the projecting direction and entering an outer hole portion (24), and a body for urging the regulation body (31) toward the projecting direction. When the regulation body (31) under projecting state abuts against the axial end portion (16a) of the first tubular body (16) in the way of contraction operation of the telescopic device (12), the regulation body (31) is pushed by the axial end portion (16a) to move in the counter-projecting direction and then escapes from the outer hole portion (24) when the regulation body (31) is pushed by the circumferential edge of the outer hole portion (24) of the second tubular body (17) to move further in the counter-projecting direction.