Finally, one hundred years after the Einstein’s general relativity, Einstein’s dream is fulfilled and the Electrogravity field equation is calculated.One of the greatest dreams of Albert Einstein, was to find a possible connection between gravity and electromagnetism. Einstein, tried a lot to do this unification, as he commented: It would be a great step forward to unify in a single picture the gravitational and electromagnetic fields, then there would be a worthy completion of the epoch of theoretical physics.This work has been done in this book and we have unified electromagnetic and gravitational fields in a single picture and find the Electrogravity field equation. As a result, we have found the actual structure of the electric charge unit (electron). Actually, the electric charge unit (electron) is not a particle nor wave and even no string; it is something else, which is different from all the things that you have learned about it up to now.