Valentin Ventura (b. 1860 - d. 1935) was a reformist during the revolutionary period. He was the one who financed the publication of Jose Rizal's El Filibusterismo.
He was born in Bacolor, Pampanga, son of Don Honorio Ventura who was the Secretary of Interior. After finishing his studies he was encouraged by his brother Don Balbino to go to Spain and join the other Filipinos like Jose Rizal, Marcelo H. del Pilar, Graciano Lopez Jaena in their quest for a peaceful reforms in the Philippines. Went to Spain and European cities, primarily for further studies. He lived there for three decades, where he visited most of the European cities and museums where he met Juan Luna. When the propaganda movement started he helped fortify the cause of the movement.
Jose Rizal got a chance to meet and be attatched to Valetin during the stay of Rizal in his house in Paris. It was where he had the opportunity to listen to the ideas of Rizal which he greatly admired. He used to read the novel Noli Me Tangere and El Filibusterismo during his free time.