Police were called to the scene, near Moo 9, Pa Khlok, at about 5:30pm.
Local emergency teams arrived on the scene to find two Thai men with head injuries sitting next to the small truck.
The van involved was carrying nine passengers, including two men, three women, and four children, all of whom suffered minor injuries.
The injured were quickly transported to nearby hospitals, with several taken to Thalang Hospital and others to Vachira Hospital for further treatment.
The van and the truck were reo,removed from the scene.
At last report police were still investigating the circumstances that led to the collision.