PURPOSE: To attain simultaneous display and to simultaneously check the schedules of plural required persons by finding out AND of plural code data.

CONSTITUTION: A function for simultaneously displaying the schedules of plural required persons from input data to a display part 4 by key operation is added to the electronic schedule board. When an input key on the keyboard K is depressed, schedule data are stored in a memory part M in accordance with the key, and when a monitor key is depressed, the schedule data of each person or that of plural required persons are simultaneously displayed from the stored data to the display part 4 in accordance with the key. Consequently, the schedule data of plural persons which may be frequently required for the execution of routine work can be simultaneously displayed when necessary.