  Highly energetic proton/electron beam fixed target experiments extends an
opportunity to probe the sub-GeV dark matter and associated interactions. In
this work we have explored the sensitivity of DUNE for sub-GeV leptophobic dark
matter i.e. this dark matter barely couples with the leptons. Baryon number
gauge theory can predicts the existence of a leptophobic cold dark matter
particle candidates. In our work, the dark matter candidate is considered to be
scalar whose mass is defined by the symmetry breaking of new baryonic gauge
group $U(1)_{B}$. In this scenario a light scalar dark matter couples with the
standard model candidates via vector boson mediator $V_{B}$ which belongs to
the baryonic gauge group $U(1)_{B}$. This leptophobic dark matter dominantly
couples to the quarks. Under this scenario new parameter space for $\alpha_{B}$
is explored by DUNE for leptophobic dark matter candidates. This new parameter
space allowed $\alpha_{B}$ to get lower value than the present exiting
constraint value of $\alpha_{B}$ i.e. $10^{-6}$.
