PROBLEM TO BE SOLVED: To provide an OCT signal processing device and an OCT signal processing program with which it is possible to change information about a specimen in a satisfactory manner.SOLUTION: The OCT signal processing device comprises: OCT data acquisition means for acquiring unidimensional OCT data obtained by performing an arithmetic operation, in the depth direction of a specimen, on two-dimensional OCT data in which OCT data based on an OCT signal detected by optical coherence tomography are arranged in the direction of scanning, the OCT data acquisition means acquiring, with regard to the same position of the specimen, a plurality of unidimensional OCT data differing in OCT signal detection timing in the optical coherence tomography； and signal processing means for processing the plurality of unidimensional OCT data acquired by the OCT data acquisition means in chronological order.SELECTED DRAWING: Figure 7
