Abstract: The dark matter problem can be interpreted as mass discrepancy or acceleration discrepancy. McGaugh 2004 discovered that mass discrepancy has a strong relation with gravitational acceleration scale, so called the Mass Discrepancy- Acceleration Relation(MDAR). Recently, McGaugh et al. 2016 found a tight relation between observational (dynamical) gravitational acceleration and baryonic gravitational acceleration by using 2693 data point of 153 spiral galaxies. We investigated MDAR in elliptical galaxies by using planetary nebulae and Einstein rings. We confirmed the MDAR in elliptical galaxies of our studies.