A conversation evaluation device includes a storage medium and a processor. The storage medium stores a program configured to evaluate a conversation that includes first voice and second voice as a response to the first voice. The processor executes the program. The program causes a processor to acquire first pitch information related to the first voice. The program also causes the processor to acquire second pitch information related to the second voice. The program also causes the processor to evaluate comfortableness of the second voice based on the acquired first and second pitch information.