  We investigate the left-right entanglement entropy of a boundary state,
corresponding to a dynamical D$p$-brane with the internal and background
fields. We assume that the brane has a tangential linear motion and a rotation,
and is dressed with an internal $U(1)$ gauge potential and the Kalb-Ramond
tensor field $B_{\mu\nu}$. We derive the entanglement entropy via the R\'{e}nyi
entropy by applying the replica trick. Our calculations will be in the context
of the bosonic string theory.
