Let ${mathcal{S}}^0_{mathcal{H}}$ be the class of normalized univalent harmonic mappings in the unit disk. A subclass ${mathcal{V}}^{mathcal{H}}(k)$ of ${mathcal{S}}^0_{mathcal{H}}$, whose analytic part is function with bounded boundary rotation, is introduced. Some bounds for functionals, specially harmonic pre-Schwarzian derivative, described in ${mathcal{V}}^{mathcal{H}}(k)$ are given.