Mitsubishi Heavy Industries, Ltd. (MHI) has developed a hybrid welding head that combines arc and laser welding functions, with the aim of applying it to the welding of sophisticated objects of complex shape such as car bodies. The hybrid welding head eliminates the directivity problem of laser welding by arranging the electrode and laser beam axes coaxially and reducing the number of controlling axes used for welding. In addition, MHI has extended the coaxial welding procedure to laser brazing. This paper presents examples of the welding results obtained by using the newly developed welding head and shows the effects of increasing groove gap tolerance, eliminating the directivity of welding, and increasing the penetration depth of brazing filler metal.