Disclosed is a microsize driving device in which falling of track proteins
from an arrangement of motor protein molecules arranged on a linear track
groove provided on a substrate is suppressed and utilization of kinetic
energy of track proteins as a driving energy is made possible by
controlling the moving direction to a single direction. Namely, provided
is a microsize driving device which comprises a substrate, an arrangement
of motor protein molecules such as, for example, kinesin molecules
deposited on the bottom of a linear track groove provided thereon and
track proteins such as, for example, microtubules disposed thereon and is
characterized in that the said linear track groove has side surfaces
shaped in such a structure as to permit a linear movement of the track
proteins moving in a certain specific direction but to inhibit the track
proteins moving in the reverse direction thereto causing reversion for
the movement in the above mentioned specific direction.