Apparatus for measuring electrocardiogram and method of recording ECG signals merged with user input

An apparatus for measuring an electrocardiogram and storing an electrocardiogram signal merged with a user input includes: a signal detector outputting an electrocardiogram analog signal by detecting an electrical signal from the heart of an object; a signal converter receiving the electrocardiogram analog signal and converting the electrocardiogram analog signal into an electrocardiogram digital signal; an input unit receiving at least one type of user input from among a voice input, a button input, a touch input, and a motion input; a processor receiving the user input, merging the electrocardiogram digital signal with the user input, and storing the electrocardiogram digital signal in an internal memory; and a communicator communicating with an external terminal to transmit the electrocardiogram digital signal to the external terminal.