The present invention provides an indication display unit for vehicles which comprises an indicating means for displaying vehicle operational information either firmly attached on the dashboard or encased in a case disposed in a dashboard, and a prism having at least three faces mounted on the dashboard in such a manner that a crest portion thereof is directed upwards at which a first and a second faces thereof abutting with each other, the first and second faces being directed, respectively, toward the driver's seat and to the windshield, and the third face firmly attached either to the dashboard or to the case such that the indication surface of the indicating means is directed upwards, whereby an indicated image projected from the indicating means enters the prism by way of the third face thereof, the indicated image entered the prism being reflected on the inner surface of the second face so as finally to be visibly observed through the first face.The above indication display unit enables a driver to visibly observe an indicated image near the driver's visual field of the windshield by reflecting the indicated image from the indicating member on a reflecting member mounted on the dashboard, and at the same time provides a stably maintained reflecting surface, an improved observability and also an improved image quality are provided.