  A photometric study of variable stars in the field of old open cluster NGC
188 is discussed. Observations were carried out in two bands R and I for 5513
stars up to R = 17 mag in the field of 1.5 x 1.5 grad. around the cluster. The
photometric data were processed by the console application "Astrokit", which
corrects brightness variations associated with the variability of atmospheric
transparency and carries out searching for variable stars. We found 18 new
variable stars and determined the parameters of one previously known variable.
Among discovered stars one is a low-amplitude pulsating variable, one is a EW
eclipsing binary, six are eclipsing variables of EA type, five objects are long
period variables, and for five stars variability type remains uncertain.
