A prosthetic valve, preferably an expandable prosthetic valve, comprises a valve component (3). The prosthetic valve (1) comprises at least two tissue supports (4', 4") attachable to an inner surface (5) of a stent component (2) or of a blood vessel or of an annulus. The valve component (3) comprises at least one leaflet (6), and at least one tissue support (4, 4") which comprises an attachment area (7', 7"). At least a section of the attachment area extends essentially inwardly from the inner surface (5) The at least one leaflet (6) is attached to the at least two tissue supports (4', 4") at the section of the two attachment areas (7', 7") such that the leaflet (6) is arranged between the attachment areas of the at least two tissue supports (4, 4") or integrally formed with one tissue support and attached to the second tissue support at the section of the attachment area.
