A further object of the present invention is to provide a biological detection device and the like capable of performing processing promptly. An input voltage with a predetermined frequency is output from an oscillating portion. By performing switching using an analog switch, the input voltage is output to an electrode via a first resistance portion. A first comparator detects an output voltage, compares the voltage with a first reference threshold stored in a storage portion, and outputs an output. Furthermore, by performing switching using the analog switch, an input voltage is output to the electrode via a second resistance portion. A second comparator detects an output voltage, compares the voltage with a second reference threshold, and outputs an output. A determination portion determines whether a test body is a living finger or a gummy finger in accordance with a combination of the values of the outputs.