To provide an apparatus and method for imaging for suppressing an air gap formation by controlling an amount of ink small droplet.

An imaging apparatus 10 comprises an ink jet printing head 45 having a nozzle for discharging ink small droplet. Since a heater element variably supplies thermal energy to the droplet, an amount of the droplet is controlled. A controller 40 for variably controlling the energy supplied to the droplet is connected to the element. The controller 40 variably controls a plurality of voltage pulses sequentially applied to the element, and variably controls the energy. As a result, an air gap forming potential at the droplet is reduced.