The present invention relates to a monocusp prosthetic valve comprising a flap made of biocompatible material, and a stent made of biocompatible or bio-absorbable material, said stent having meshes defining holes with profile represented by any closed curve or polygonal shape, wherein in said prosthetic valve the flap is sewn on said stent by means of pairs of suture points that are longitudinally extended along opposite surfaces of said flap.