The electronic structure of electron-doped cuprates is discussed in the regions of small and optimal doping. For optimal doping we obtain the parameters from a simple tight-binding analysis by fitting ARPES data, and for small doping we study the band structure by the generalized tight-binding method that takes strong electronic correlations into account explicitly. This method has also reproduced well the ARPES data for small doping. The effective low-energy Hamiltonian is the t–t′–J model with hopping parameters t and t′. We compare both methods and find very good agreement for the value of t while t′ is different because it is caused by the different contribution of the short-range spin correlations.