A linear motor mover with heat dissipation unit includes: a base seat; a mover having several coils sequentially upright arranged with first ends of the coils disposed in the base seat; a heat dissipation unit having a hollow and substantially slat-shaped cooling section, one face of the cooling section being immediately adjacent to second ends of the coils opposite to the base seat, whereby the heat generated by the coils during operation of the mover can be conducted from the coils to the cooling section, the cooling section containing a cooling fluid therein, the cooling fluid flowing within an interior of the cooling section to carry away the heat absorbed by the cooling section; and an insulation section disposed between the heat dissipation unit and the coils. With the heat dissipation unit, the linear motor has better heat dissipation efficiency and driving efficiency and is assembled at lower cost.