A magazine loader comprises a magazine compartment (30), an elongated slideway (14) having a bullet and a case grooves (18, 22), respectively, along its length profiled to receive and retain the distal ends of rounds (50) between them, and a slider (40) slidable in slideway (14). A magazine (60) is positioned in compartment (30) such that its open end is perpendicular and in continuation to slide-way (14), and is leveled to receive rounds (50) slidable in slideway (14). Slider (40) is moved away from magazine (60) and a plurality of rounds (50) are sequentially placed in slideway (14) in and between grooves (18, 22). When all rounds (50) are placed in slideway (14), slider (40) is used to thrust all rounds (50) into magazine (60) with a single quick hand stroke.