To provide a door opening/closing handle latch device for allowing easy and quick lock replacing work as required.

This replacement pin tumbler cylinder lock comprises an inner cylinder 18 storing a cord pin 19 and an outer cylinder 21 on which the inner cylinder 18 is mounted rotatable and unremovable in the axial direction. The outer periphery contour of the outer cylinder 21 has a sectional shape corresponding to the inner periphery contour of a lock storage portion 9. A pair of locking pin storage portions 25 for storing a driver pin 23 and a pair of unlocking pin storage portions 29 for storing a driver pin 27 are protruded on the outer peripheral face of the outer cylinder 21 and arranged at a space being the same as a space between a locking engaging groove 11 and an unlocking engaging groove 12 of the lock storage portion 9. The outer periphery contour of each of the locking pin storage portion 25 and the unlocking pin storage portion 29 has a sectional shape corresponding to the inner periphery contour of each of the locking engaging groove 11 and the unlocking engaging groove 12.