An operation assistance device of a railway vehicle for assisting a driver's vehicle operation, having an operation assistance information presenting device to output operation assistance information in the form of voice information, visual information, tactile information or a combination thereof to a driver of a railway vehicle, the operation assistance information indicating a difference between a target driving operation signal and a driving command signal input by the driver, comprising: a vehicle information controlling device which records collected vehicle information including ID information of the driver, power consumption information consumed in a driving device of the railway vehicle, the driving command signal input by the driver through a controller, and operation assistance information output from the operation assistance information presenting device; a driving operation command calculating device which creates the target driving operation signal to realize a target power consumption; a difference signal creating device which extracts the driving command signal of the collected vehicle information in which power consumption information exceeds a predetermined power consumption from the collected vehicle information recorded in the vehicle information controlling device, and creates a difference signal between the driving command signal of the collected vehicle information and the target driving operation signal; characterised in that the operation assistance device further comprises an operation assistance information analyzing device which obtains a presentation timing to the driver of the operation assistance information by selecting a presentation timing having a power consumption being not more than a threshold or being a minimum power consumption, according to a relationship between presentation timings of the operation assistance information and the power consumption information of the collected vehicle information, based on the driver ID information of the collected vehicle information; and an operation assistance information creating device which creates new operation assistance information, based on the presentation timing of the operation assistance information obtained by the operation assistance analyzing device and the difference signal obtained by the difference signal creating device, and transmits the created new operation assistance information to the operation assistance information presenting device. a vehicle information controlling device which records collected vehicle information including ID information of the driver, power consumption information consumed in a driving device of the railway vehicle, the driving command signal input by the driver through a controller, and operation assistance information output from the operation assistance information presenting device; a driving operation command calculating device which creates the target driving operation signal to realize a target power consumption; a difference signal creating device which extracts the driving command signal of the collected vehicle information in which power consumption information exceeds a predetermined power consumption from the collected vehicle information recorded in the vehicle information controlling device, and creates a difference signal between the driving command signal of the collected vehicle information and the target driving operation signal; characterised in that the operation assistance device further comprises an operation assistance information analyzing device which obtains a presentation timing to the driver of the operation assistance information by selecting a presentation timing having a power consumption being not more than a threshold or being a minimum power consumption, according to a relationship between presentation timings of the operation assistance information and the power consumption information of the collected vehicle information, based on the driver ID information of the collected vehicle information; and an operation assistance information creating device which creates new operation assistance information, based on the presentation timing of the operation assistance information obtained by the operation assistance analyzing device and the difference signal obtained by the difference signal creating device, and transmits the created new operation assistance information to the operation assistance information presenting device.