There is provided a hearing aid fitting apparatus with which the needs of a hearing aid user can be satisfied. The present invention is constituted such that this apparatus comprises an adjustment value input part 2 and a display part 3 on which is displayed hearing aid data set by this adjustment value input part 2, wherein first favorably assisted hearing aid data is selected from among first and second hearing aid data set by the adjustment value input part 2, then this selected first favorably assisted hearing aid data is compared with third hearing aid data set by the adjustment value input part and second favorably assisted hearing aid data is selected, after which the first and second favorably assisted hearing aid data are displayed on the display part, and hearing aid write data is selected from the first and second favorably assisted hearing aid data displayed on the display part.