A driving diagnosis device includes storage device which stores plural pieces of advice and a processor. The processor makes a diagnosis on driving by a driver according to vehicle information indicating at least one of behavior of a certain vehicle and an operation of the driver while the driver is driving the certain vehicle. The processor judges a degree of influence, on the diagnosis, of a driving experience of the driver before the driver drives the certain vehicle according to history information as for a history of the driver driving one or more different vehicles including the certain vehicle. And the processor determines to present to the driver a piece of advice stored in the storage device, from among plural pieces of advice, in association with a combination of a result of the diagnosis and the judged degree of influence.
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