The invention provides an insulator-coated soft magnetic powder, a powder magnetic core, a magnetic element, and an electronic device. The insulator-coated soft magnetic powder has a good insulation performance at a high temperature and the reliability of the powder magnetic core, the magnetic element, and the electronic device is high at a high temperature. The insulator-coated soft magnetic powder includes a core portion which contains a soft magnetic material, and an insulating layer which is provided on the surface of the core portion and contains a glass material including Bi2O3 as a maincomponent, wherein the content of an alkali metal in the insulating layer is 5 mol% or less. It is preferred that the glass material further contains at least one of ZnO and B2O3. It is also preferred that the content of Bi2O3 in the glass material is 40 mol% or more and 80 mol% or less.