To provide a driving condition display device for a saddle type vehicle with which a rider can know whether energy-saving drive is performed or not as a result of total drive in traveling for a certain time without requiring a fuel flow rate meter.

A non-volatile memory 15a storing operation modes possibly to read by giving an evaluation point to each drive operation mode in proportion to a degree of the energy save drive or uneconomical drive is provided. A microcomputer 15 specifies an operation mode by computing the rotating speed and acceleration, and repeats reading an evaluation point corresponding to the operation mode from the non-volatile memory till a predetermined time passes, and adds them, and determines in which region of the energy-saving drive and uneconomical drive the addition value exists, and displays it with display means 17 and 18 for a certain time.