The invention provides a roller traverse device, which comprises a roller traverse device body and a main bearing unit, and the roller traverse device body comprises two fixed parts and a pair of vertical walls protruding from the opposite ends of the fixed parts, wherein each vertical wall is provided with a plurality of hollow parts, and both ends of the main bearing unit are respectively pivoted on each vertical wall； wherein, the hollow parts The main bearing unit is surrounded by a part so as to reduce the overall weight of the roller conductor and achieve the purpose of lightweight.本創作提供一種滾輪導線器，包含有一滾輪導線器本體與一主軸承單元，而該滾輪導線器本體包含有二固定部及一對自該等固定部相對端凸設之直立壁，其中，每一該直立壁設有複數鏤空部；以及該主軸承單元其兩端係分別樞設於每一該直立壁上；其中，該等鏤空部環繞於該主軸承單元的周側，藉以減少該滾輪導線器之整體重量，而達到輕量化之目的。
