The results of astrometric and photometric investigations of the open cluster NGC 7243 are presented. Proper motions of 2165 stars with root-mean-square error of 1.1 mas yr^-1 were obtained by means of PDS scanning of astrometric plates covering 97 years. A total of 211 cluster members down to V = 15.5 mag have been identified. V and B magnitudes have been determined for 2118 and 2110 stars respectively. Estimations of mass (348 M_⊙ ≤ M_TOT ≤ 522 M_⊙), age (t = 2.5 × 10⁸ yr), distance (r = 698 pc) and reddening (E_B-V = 0.24) of the cluster NGC 7243 have been made.