To provide a newly designed garment comprising a combination of at least two pieces of garments made by a method of separating or joining material or color using free curves/straight lines at any positions desired by a producer or a wearer so as to be applicable to free design like order-made one by applying the process of the method to the product.

The newly designed garment is made in accordance with the following production processes shown in Fig.: a process 1 of preparing two pieces of T-shirts each having different color and material from each other; a process 2 of superimposing the two pieces of T-shirts on each other; and cutting the superimposed pieces of T-shirts so as not to cause displacement to evenly separate the two pieces of T-shirts; and a process 3 of obtaining the T-shirts each divided into two; a process 4 of exchanging any divided two pieces of T-shirts with each other at will, and joining again the exchanged two pieces of the T-shirts: wherein a belt having a width of about 10 mm is put on the joined surface and sewn up the belt and the T-shirts so as to suppress reduction in volume resulting from overlapped margins.