Abstract: A device for indicating the economical operating range of an internal combustion engine. The device includes two indicating elements arranged in a common housing. One indicating element indicates the momentary load condition of the internal combustion engine, and the other indicates the momentary speed. Each indicating element has its own measured value scale, lying in a common plane with that of the other, and also has an indicator needle. Each measured value scale includes an upper limit value and a lower limit value which are dependent upon the characteristic of the internal combustion engine being measured, and which define the economical operating range of the internal combustion engine as a function of the parameter being measured.