The essential role of the disturbed ionospheric dynamo electric field in behavior of the ionosphere during geomagnetic disturbances was marked by many researchers. However till now it has not been carried out the researches of disturbed ionospheric dynamo electric field generated by variations of magnetosphere convection electric field and electric field of Alfven layer connected with field aligned currents of the second region, during geomagnetic storm at various phases of its development. In the given research we represent the results of modeling calculations of the disturbed dynamo electric field and its ionospheric effects at middle and low latitudes for geomagnetic storm on December 14-15, 2006. Calculations have been executed with use of the Global Self-consistent Model of Thermosphere, Ionosphere and Protonosphere (GSM TIP), developed in West department of IZMIRAN. At that the dependence of potential difference through polar caps and field-aligned currents of the second region from AE-index of geomagnetic activity with the one-minute resolution and high-energy particle precipitation dependent on 3-hour Kp-index of geomagnetic activity was taken into account. Besides it was taken into account half-hour delay of development of the second region field-aligned currents relative to the variations of potential difference through polar caps and their shift to equator with growth of geomagnetic activity. Calculations were carried out for quiet and disturbed conditions with took into account the superposition of dynamo electric field and magnetosphere convection electric field, and also without taking into account dynamo field. It has allowed separating off the effects of the disturbed dynamo electric field in parameters of the ionosphere and thermosphere. It was carried out the analysis of obtained calculation results and it was drawn the conclusion about the role of the disturbed dynamo electric field in the ionosphere during geomagnetic disturbances. The research is carried out at financial support of the Russian Foundation for Basic Research (Grant №08-05-00274).