In an electronic device, a pulse rate measuring unit measures users pulse rate. For example, the pulse rate measuring unit obtains a change in blood flow from a light passing through a users fingertip, and measures users current pulse rate based on it. A pulse rate memory unit has previously stored users previous pulse rate. A pulse rate calculator calculates the users pulse rate while changing a ratio of the users current pulse rate measured by the pulse rate measuring unit to the users previous pulse rate previously stored in the pulse rate memory unit after starting to measure the users pulse rate. The users pulse rate calculated by the pulse rate calculator is displayed as the users pulse rate on a display unit.
