The trip comes after a breakthrough deal was reached in Paris in December to lighten Cuba's foreign debt and days after France hosted the leader of another long-time pariah state: Iran.
Castro, 84, is on his first official trip to Europe since taking over from his elder brother Fidel in 2006. The Cuban president briefly stopped to Rome last year to meet with Pope Francis.
He received a formal welcome Monday at the Arc de Triomphe monument. He will attend later a state dinner with President Francois Hollande.
The French government was instrumental in securing the debt relief deal.
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In December, the Paris Club of creditor countries forgave USD 8.5 billion of overdue Cuban interest payments in exchange for Cuba's promise to pay off USD 2.6 billion in loans from developed countries over the next year and a half. France, to which Cuba owed USD 4 billion in overdue loans, led the creditors' negotiations.
Hollande was the first French leader to visit Cuba in a half-century, with a trip in May aimed at boosting trade. French companies are looking for business opportunities to open up especially in tourism, transport, food and environmental industries.
A dozen bilateral agreements are expected to be signed during Castro's visit, including one regarding Cuba's remaining debt to France, which amounts to USD 390 million (360 million euros).
The two countries are also hoping to develop university and scientific exchanges.