PURPOSE: To improve the workability, by using a key switch, an optical hand scanner, and a microphone, as a write-in device, in an information device of an electronic memory for storing a schedule, etc.

CONSTITUTION: An information device as what is called an electronic memory device for storing the information which is generated in a human daily life is mainly constituted of a storage part 5 and a control part 10. The workability is improved by using a key switch 2, a microphone 3, and an optical hand scanner 4, as its input part 1, and also an indicator 7 and a speaker 8 are provided as its output part. A printer 9 may be provided as well as an output part 6 if necessary.