The ballistic transport properties of electrons in bent quantum wires are studied. The bent quantum wire composed of T-typed and single-bent quantum wires has finite length and connects to two semi-infinite quantum channels, which serve as emitter and collector when a potential difference is applied. The numerical results show that the conductance have two peaks at the energy of electrons less than the eigenvalue of the first transverse mode. Furthermore, these peaks are due to the resonant tunneling via bound states in the quantum structure. The detailed studies of these quantum bound states are shown in the paper.