Yakisoba (Japanese: 焼きそば, [jakiꜜsoba], transl. 'fried noodle') is a Japanese noodle stir-fried dish. Usually, soba noodles are made from buckwheat flour, but soba in yakisoba are Chinese-style noodles (chuuka soba) made from wheat flour, typically flavored with a condiment similar to Worcestershire sauce. The dish first appeared in food stalls in Japan around the 1930s.

Yakisoba is prepared by frying ramen-style wheat noodles with bite-sized pork and finely chopped vegetables like cabbage, onions, bean sprouts, and carrots. It is then flavored with Japanese-style Worcestershire sauce, salt, and pepper. It can be served with a variety of garnishes, such as aonori (seaweed powder), beni shōga (shredded pickled ginger), katsuobushi (bonito fish flakes), or Japanese-style mayonnaise.

Yakisoba can be served on a plate either as a main dish or a side dish.

In Japan, noodles piled into a bun sliced down the middle and garnished with mayonnaise and shreds of red pickled ginger are called yakisoba-pan (pan meaning "bread") and are commonly available at convenience stores and school canteens.

Sometimes udon is used as a replacement for the ramen-style noodles and called yaki udon.