To provide a sample detection device having an electrode and electrode wiring for performing power supply surely and simply, concerning the disk-type sample detection device, and a sample detection apparatus equipped with a connector for supplying the power to the sample detection device.

On dick-shaped substrates 1a, 1b transmitting a light beam a, wiring patterns 5a, 5b connected to a liquid reservoir 3 in a passage 4, the second electrode 6 connected to an inlet 2 of the passage 4, a first electrode contact 7 for supplying an external power to the first electrode 5, a second electrode contact 8 for supplying the external power to the second electrode 6, and a wiring pattern 5b for connecting the first electrode 5 to the first electrode contact 8 are formed. The first electrode contact 7 and the second electrode contact 8 are formed approximately circularly and concentrically so as not to be mutually in electrical contact near the center part of the substrates 1a, 1b. The power can be supplied surely and simply by this sample detection device 1.