The invention relates to a valve (1, 20) having a leakage indicator (2), containing a valve housing, which preferably comprises at least two parts, an upper valve-housing part (3) and a lower valve-housing part (4), and containing a membrane (5), wherein the membrane divides the valve housing into a region (7) through which fluid flows and a fluid-free region (8), wherein the leakage indicator (2) is formed by an absorbent element (15), wherein the absorbent element (15) protrudes into the fluid-free region (8).