Abstract: A dialysis probe includes a tubular dialysis membrane sealed at its tip, a support tube coupled at a tip to a rear end of the dialysis membrane, a cap portion for securing a rear end of the support tube, an inlet conduit extending through the cap portion toward the tip of the dialysis membrane within a space to guide a perfusate into the space, an outlet conduit extending through the cap portion toward the tip of the dialysis membrane within the space to guide the perfusate in the space outside the space, and at least one air-exposure through-hole provided in the cap portion for maintaining the space at atmospheric pressure. The inlet conduit has a longer protruding length from the rear end of the support tube when compared to the outlet conduit.

Abstract: Provided is a dialysis probe capable of stably performing an analysis with high accuracy for a long period of time even if the inflow and outflow rates of a perfusate are not completely equalized.

Abstract: An electrochemical detection device comprising a cell unit that has a cell therein and a supporter that rotatably supports said cell unit and that is made in one piece with said cell unit, wherein said cell unit has a cell block that has a test solution introduction route through which a test solution flows after being introduced into the inside of said cell block and that has a test solution outlet route through which the test solution leaves the inside and that has a reference electrode and a counter electrode provided so that they come into contact with the test solution flowing from said test solution introduction route to said test solution outlet route; a gasket that has an opening constituting said cell, and that is in contact with said cell block so that said opening is connected with both the test solution introduction route and the test solution outlet route; a working electrode that faces said opening of the gasket, and said supporter has a pressure means that pushes said working electrode onto sai