In an ink jet recording apparatus, it is detected whether or not an
ejection has been performed at least one time while printing an image,
with respect to each nozzle, within a predetermined period (preliminary
on-paper ejection cycle corresponding to the checking area C1), and the
nozzle which has performed the ejection at least one time is excluded
from a target of preliminary ejection within a second predetermined
period (preliminary on-paper ejection cycle corresponding to the checking
area C2) subsequent to the above predetermined period. As for the nozzle
not excluded from the preliminary ejection target, the preliminary
ejection is performed at least one time onto paper (preliminary on-paper
ejection area R2) as to each nozzle at a predetermined timing within the
second predetermined period (preliminary on-paper ejection cycle
corresponding to the checking area C2). Accordingly, printing is not
interrupted by a head recovery processing, and also unnecessary
preliminary ejection can be reduced. In the case of a recording medium
such as cardboard and envelope, which is processed after recording and
changed in shape so as to functionate as desired, the preliminary
ejection is performed onto a position defined according to the shape, for
example, flap portion (206C), overlap portion (206A), and the like,
without exceeding a predetermined density.