To provide a vehicle operation history storage device for suppressing disappearance of operation contents effective for fault analysis.

The vehicle operation history storage device 100 for recording operation information of a vehicle operated by a prescribed operation includes: a rewritable nonvolatile storage means 22; a storage means management means 25 for subscribing the operation information from the old one and storing it in the storage means; a conversion condition storage means 23 for storing a conversion condition for converting a series of continuously generated operation information into one piece of operation information; and an operation condition management means 24 for converting the series of pieces of operation information into one piece of the operation information when the series of continuously generated operation information satisfy the conversion condition.