We propose a holographic correspondence of the flat
spacetime based on the behavior of the entanglement entropy and the
correlation functions. The holographic dual theory turns out to be
highly non-local. We argue that after most part of the space is traced
out, the reduced density matrix gives the maximal entropy and the
correlation functions become trivial. We present a toy model for this
holographic dual using a non-local scalar field theory that reproduces
the same property of the entanglement entropy. Our conjecture is
consistent with the entropy of Schwarzschild black holes in
asymptotically flat spacetimes.