Pyralis farinalis, the meal moth, is a cosmopolitan moth of the family Pyralidae. Its larvae (caterpillars) are pests of certain stored foods, namely milled plant products.

It is the type species of the genus Pyralis, and by extension of its entire tribe (Pyralini), subfamily (Pyralinae) and family. Its synanthropic habits were noted even by 18th- and 19th-century naturalists, who described it using terms like domesticalis ("of home and hearth"), fraterna ("as close as a brother"), or the currently-valid farinalis ("of the flour").

At rest, adult moths (imagines) typically hold the tip of their abdomen at 90° to their body. Their upperwings are fairly colourful by moth standards, and have a wingspan of 18–30 mm. Adults fly from June to August. As adults do not live long after mating and eggs hatch quickly, this moth has a quick life cycle and is able to produce multiple generations within a single year.

In Great Britain and some other locations – particularly outside its natural range – it is mostly restricted to anthropogenic habitats of stored grain, e.g. barns and warehouses. However, it has been found in almond orchards among plant detritus and poultry farms among chicken manure.

P. farinalis is a species that is well adapted to living among humans and the urbanization that comes along with them. Though considered a pest to most, since it can decimate grain storages, humans have found uses for the moth. In Chinese culture it is the main ingredient of "insect tea." This drink is popular enough that scientists have been studying the moth's optimum growth conditions so they can possibly cultivate it for commercial use.

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