To provide a heated and/or cooled mat, reducing the force for separating or shifting base plates from each other, which is applied to the base plates from a heating and/or cooling pipeline to improve lying work efficiency.

A floor heating mat 1 is formed by arranging split mats A-H. The first and second column hot water pipelines 3 out of four hot water pipelines 3 pulled from the base plate A to the base plate E are pulled substantially in the shape of S near a butted part T4 between the base plates A, E, and the third and fourth column hot water pipelines 3 are pulled in the shape of an inverted S. Although stresses F1, F2 to always become straight pipe are generated in the respective pipelines 3, the component force in the lateral direction of force F1 applied from the first and second column hot water pipelines 3 to the base plates A, E and the component force in the lateral direction of force F2 applied from the third and fourth column hot water pipelines 3 to the base plates A, E cancel each other.