PROBLEM TO BE SOLVED: To facilitate, at a pharmacy site, attachment/detachment of a tablet cutting blade 41 with respect to a tablet cutting blade replacement jib 60 that is inserted into/extracted from a tablet splitting device 20 and delivers the tablet cutting blade 41, and to expose a blade edge without removing the tablet cutting blade 41.SOLUTION: A tablet cutting blade replacement jig 60 includes: a jig body 61 that can be inserted into/extracted from a support member 28 as substitute for a fallen-tablet guide member 31 a blade holding part 64 that retains a tablet cutting blade 41 in a notch 63 of the jig body 61 an operation member 72 that changing over the state between the continuation and release of the retention according to a manual operation and an energizing member (73) for maintaining a state after the changeover in any of a retention continuation side and the retention release side. Further, the jig body 61 includes two plate-like bodies 61a and 61b in an openable/closable state and holds the tablet cutting blade 41, with a blade edge facing the inward surfaces when the two plates are closed.COPYRIGHT: (C)2015,JPO&INPIT