To provide a vibration pickup evaluation method and an evaluation device of an engine diagnosis device capable of evaluating easily fault generation of the vibration pickup or the like.

In this vibration pickup evaluation method and this evaluation device, the vibration pickup 1 of the engine diagnosis device having the vibration pickup 1 mounted detachably on an engine and a diagnosis device body 2 for diagnosing the engine based on an output from the vibration pickup 1 is evaluated. In the engine non-diagnostic state wherein the vibration pickup 1 is dismounted from the engine, the vibration pickup 1 is excited by an exciter 6, and the vibration pickup 1 is evaluated by the diagnosis device body 2 based on the output acquired from the vibration pickup 1. Hereby, reliability of an engine diagnosis result can be heightened, and the vibration pickup 1 can be evaluated efficiently by utilizing the interval of the engine diagnosis.