An illusionary tactile force generating device gives a first illusionary tactile force and a second illusionary tactile force different from each other. The illusionary tactile force generating device includes a vibration generator, a vibration generator, an attachment unit, and an attachment unit. The vibration generator generates a first vibration for generating the first illusionary tactile force. The vibration generator generates a second vibration for generating the second illusionary tactile force. The attachment unit allows the vibration generator to be attached to an index finger of a hand of a user. The attachment unit allows the vibration generator to be attached to the index finger. The first vibration and the second vibration are vibrations different from each other. The attachment unit and the attachment unit are disposed at different positions in a direction in which the index finger extends.