To provide a measuring method of the communication time in HTTP communications for measuring communication time viewed from an HTTP client in HTTP(hyper text transport protocol) communications.

When an HTTP request is transmitted from an HTTP client 1 to an HTTP server 5 and an HTTP response is returned from the HTTP server 5 to the HTTP client 1, the pass time of a packet constituting the measurement of request time from the transmission of the HTTP request from the HTTP client 1 to the return of the HTTP response form the HTTP server 5 and the measurement of the transfer time of data transmitted to the HTTP client 1 from the HTTP server 5 by following the HTTP response is recorded in a measuring server 3. Thus, communication time is measured from request time and data transfer time by analyzing recording information.