Consider a Lagrangian immersion, i.e., an immersion of a Riemannian manifold \(M\) into a Kähler \(n\)-manifold \(\overline{M}\) such that it is an isometric immersion whose complex structure \(J\) of \(\overline{M}\) interchanges each tangent space of \(M\) with its corresponding normal space. A Lagrangian immersion is called Masolvian if its Maslov vector field \(JH\), where \(H\) is the mean curvature of \(M\), is a principal direction of the shape operator \(A_H\) of \(M\). The authors classify Maslovian Lagrangian immersions of real space forms of dimension \(\geq 3\) into complex space forms, completing the work of the first author, of \textit{N. Ejiri} [Proc. Am. Math. Soc. 84, 243--246 (1982; Zbl 0485.53022)] and several others. This paper is clearly written.