Generalized parton distribution functions of light nucleus, Helium-3, are discussed based on a simple phenomenological effective Lagrangian approach. He-3 is simply regarded as a weekly bound state of a neutron and a 0(+) dibaryon with two protons. The generalized parton distributions of He-3 and the dibaryon are explicitly expressed in terms of the generalized parton distributions of the proton and neutron. Nucleon effect on the distributions of the 0(+) dibaryon is shown. Moreover, the electromagnetic form factors of He-3 are estimated according to the generalized parton distributions of the proton and neutron and to the loop integrals which represent the nuclear effect. It is found the present simple approach could qualitatively reproduce the form factors of Helium-3. (C) 2013 Elsevier B.V. All rights reserved.