Abstract: The piezoresistive or capacitive flat pressure sensor (130) comprises a flexible flat membrane (100) made of ceramic material and a relative rigid flat support (110) made of ceramic material, wherein the support (110) has a first main face (220) and a second main face (230), and the membrane (100) has a first main face (200) and a second main face (210), and wherein the first main face (200) of the membrane (100) faces the second main face (230) of the support (110), the first main face (200) of the membrane (100) comprising at least one first electrical circuit (501), the first main face (220) of the support (110) comprising at least one second electrical circuit (502), on the perimeter of the rigid support (110) of the pressure sensor (130) an electrical connection being further provided between the first electrical circuit (501) of the first main face (200) of the membrane (100) and the second electrical circuit (502) of the first main face (220) of the support (110).