Hotel security found two handguns, a Koran and ammunition on him, according to police.
The man was arrested as a metal detector rung out as the man passed through.
Police were called and arrested the suspect while they secured his vehicle.
They then tracked down his girlfriend who was also taken into custody.
Papers found on the suspect indicated that he lived in Paris, however no further details were available about him.
Disneyland Paris is situated about 30 kilometres (18 miles) east of the French capital and is the most visited theme park in Europe.
France is on high alert after a devastating terror attack in November saw Islamic State group gunmen and suicide bombers target Paris cafes, a concert hall and the Stade de
France national stadium, leaving 130 dead and hundreds injured.
The bloodshed was the second major attack in France within a year, as the country has become a prime target for the jihadist group operating out of Iraq and Syria.
In January 2015, Paris experienced three days of terror as a series of attacks left 17 people dead, including an attack on the satirical newspaper Charlie Hebdo.
France imposed a three-month state of emergency after the November attacks, which President Francois Hollande hopes to extend for another three months, despite fierce opposition from rights activists.