  This paper presents a three-dimensional simulation of chromospheric jets with
twisted magnetic field lines. Detailed treatments of the photospheric radiative
transfer and the equation of states allow us to model realistic thermal
convection near the solar surface, which excites various MHD waves and produces
chromospheric jets in the simulation. A tall chromospheric jet with a maximum
height of 10--11 Mm and lifetime of 8--10 min is formed above a strong magnetic
field concentration. The magnetic field lines are strongly entangled in the
chromosphere, which helps the chromospheric jet to be driven by the Lorentz
force. The jet exhibits oscillatory motion as a natural consequence of its
generation mechanism. We also find that the produced chromospheric jet forms a
cluster with a diameter of several Mm with finer strands. These results imply a
close relationship between the simulated jet and solar spicules.
