The pizzas are a product of Germany and have been distributed across Canada.
The recalled pizzas are Buitoni Funghi Rustico, Buitoni Margherita, Buitoni Pepperoni Diavolo, Buitoni Pollo Toscano and Buitoni Spinaci Fresca.
The Canadian Food Inspection Agency says there have been no reported consumer complaints about them in Canada.
But at least two complaints have been reported in Europe, according to the just-food.com web site.
The agency says it's monitoring the effectiveness of the recall.