To provide a power-supply-isolation-type electronic device capable of incorporating a power supply part into a main body part, and by which a feeding method can be easily confirmed.

A power-supply-isolation-type electronic device has a main body part 10 and a power supply part 20. The power supply part 20 can be separated from the main body part 10, and also incorporated into the main body part 10. A display element 11 is provided to the main body part 10. A display condition of the display element 11 is visible from outside the main body part 10. The display condition of the display element 11 is changed between the case where feeding is performed from the power supply part 20 to the main body part 10 in a state that the power supply part 20 is incorporated into the main body part 10 (a state in Fig. 1(a)), and the case where feeding is performed from the power supply part 20 to the main body part 10 in a state that the power supply part 20 is not incorporated into the main body part 10 (a state of Fig. 1(b)).