This study examines the effects of laser power and welding current on the microstructure and mechanical properties of 40Mn medium carbon steel welded joints. A 6mm-thick 40Mn steel was employed as the test material. The laser power and welding current parameters were optimized to analyze the resulting microstructure using optical microscopy (OM) and scanning electron microscopy (SEM). The findings indicate that as laser power increases, the weld penetration phenomenon diminishes, porosity tendency reduces, and the tensile strength of the welded joint improves. Similarly, an increase in welding current enhances the droplet transition mode, decreases porosity tendency, and augments the tensile strength of the welded joint. The microstructure of the 40Mn steel joint obtained through laser-arc hybrid welding is characterized by the presence of acicular ferrite, trostenite, upper bainite, and lower bainite. These observations provide insights into the optimization of welding parameters for improving the quality of laser-arc hybrid welded joints in medium carbon steels.