Castorama (French pronunciation: [kastoʁama]) is a French retailer of DIY and home improvement tools and supplies, headquartered in Templemars, France, and is part of the British group Kingfisher plc, which has 101 stores in France and 90 in Poland.

In February 2009, Kingfisher sold 31 stores of Castorama in Italy to French retailer Leroy Merlin.

In 1969, Christian Dubois founded in Englos, near Lille, France's first large-scale (5000 m2) DIY store.

The rapid expansion of the chain meant that 20 years later Castorama had 80 stores in France.

[4] In 1977, Castorama launched its famous slogan "Chez Casto, y a tout ce qu'il faut!