Road surface type detection device

Provided is a road surface type detection device capable of detecting an excellent comparison between the magnitude and the frequency of a strain sensor signal waveform on the basis of information of a low-speed region, and discriminating in real time between asphalt and other road surface types, which are reference road surface types. A road surface type detection device (10) that estimates a plurality of road surface types, i.e., asphalt, sand road, and grass road, is provided with: at least one sensor element (1, 2, 3) that detects a physical quantity of a vehicle; a road surface type estimation unit (4); and a storage unit (411) that stores the output values of the sensor elements (1, 2, 3) corresponding to the plurality of road surface types. On the basis of the magnitude of the waveform of the sensor signals output by the sensor elements (1, 2, 3), an asphalt road, a sand road, or a grass road, which is one of a plurality of road surface types, is estimated. Thus, asphalt and other road surface types ca