  In this paper, we introduce a new graph structure, called the $direct~ sum
~graph$ on a finite dimensional vector space. We investigate the connectivity,
diameter and the completeness of $\Gamma_{U\oplus W}(\mathbb{V})$. Further, we
find its domination number and independence number. We also determine the
degree of each vertex in case the base field is finite and show that the graph
$\Gamma_{U\oplus W}(\mathbb{V})$ is not Eulerian. We also show that under some
mild conditions the graph $\Gamma_{U\oplus W}(\mathbb{V})$ is triangulated. We
determine the clique number of $\Gamma_{U\oplus W}(\mathbb{V})$ for some
particular cases. Finally, we find the size, girth, edge-connectivity and the
chromatic number of $\Gamma_{U\oplus W}(\mathbb{V})$.
