An in-vehicle device comprising: a measured value acquisition means arranged to acquire measured values concerning a vehicle as first and second measured values; an image storage means (130, 220) which stores kinds of basic images that can be used for displaying the first and second measured values, wherein the image storage means (130, 220) is arranged to store: i) a basic image showing a case where each of the first and second measured values acquired by the measured value acquisition means are maximum values; and ii) a basic image showing a case where each of the first and second measured values acquired by the measure value acquisition means are minimum values; and iii) a basic image showing a case where the first measured value acquired by the measured value acquisition means is the minimum value, and the second measured value acquired by the measured value acquisition means is the maximum value an image generation means arranged to generate an image for display use by combining said basic images while transparentizing some areas of given basic images among the kinds of basic images, depending on the first and second measured values acquired by the measured value acquisition means; and an image display means arranged to display the image for display use generated by the image generation means. a measured value acquisition means arranged to acquire measured values concerning a vehicle as first and second measured values; an image storage means (130, 220) which stores kinds of basic images that can be used for displaying the first and second measured values, wherein the image storage means (130, 220) is arranged to store: i) a basic image showing a case where each of the first and second measured values acquired by the measured value acquisition means are maximum values; and ii) a basic image showing a case where each of the first and second measured values acquired by the measure value acquisition means are minimum values; and iii) a basic image showing a case where the first measured value acquired by the measured value acquisition means is the minimum value, and the second measured value acquired by the measured value acquisition means is the maximum value an image generation means arranged to generate an image for display use by combining said basic images while transparentizing some areas of given basic images among the kinds of basic images, depending on the first and second measured values acquired by the measured value acquisition means; and i) a basic image showing a case where each of the first and second measured values acquired by the measured value acquisition means are maximum values; and ii) a basic image showing a case where each of the first and second measured values acquired by the measure value acquisition means are minimum values; and iii) a basic image showing a case where the first measured value acquired by the measured value acquisition means is the minimum value, and the second measured value acquired by the measured value acquisition means is the maximum value an image generation means arranged to generate an image for display use by combining said basic images while transparentizing some areas of given basic images among the kinds of basic images, depending on the first and second measured values acquired by the measured value acquisition means; and an image display means arranged to display the image for display use generated by the image generation means.