Provided is a technology which makes it possible to connect a disposable endoscope (single-use endoscope) to an existing endoscope system (existing processor) so that the disposable endoscope can be used without increasing the cost thereof. The present disclosure discloses (see Fig. 1) a relay adapter for connecting a processor and an endoscope device, the relay adapter being provided with: a first connector portion for connecting an endoscope device； a second connector portion for connecting a processor； a storage portion for storing a program for controlling the operation of the relay adapter； and a control portion which reads the program from the storage portion and executes the program. The control portion executes: a process of acquiring first specifications information including the content of signal processing in the endoscope device, and second specifications information including the content of signal processing in the processor； a process of comparing the first specifications information with the second specifications information, converting, on the basis of the result of the comparing, a signal received from the endoscope device so as to be processable by the processor, and generating a converted signal； and a process of outputting the converted signal to the processor.L'invention concerne une technologie qui permet de connecter un endoscope jetable (endoscope à usage unique) à un système d'endoscope existant (processeur existant) de telle sorte que l'endoscope jetable peut être utilisé sans augmenter le coût de celui-ci. La présente invention concerne (voir Fig. 1) un adaptateur de relais pour connecter un processeur et un dispositif d'endoscope, l'adaptateur de relais comprenant : une première partie de connecteur pour connecter un dispositif d'endoscope ； une seconde partie de connecteur pour connecter un processeur ； une partie de stockage pour stocker un programme destiné à commander le fonctionnement de l'adaptateur de relais ； et une partie de comm
