Seven-week-old potted tomato transplants treated with commercial mycorrhizal inoculum were planted on podzolic soil in the middle of May and trained to one shoot plant at the stakes till August 28th. Mycorrhization did not affect the length and the diameter of tomato stem, infestation of tomato plants by tomato blight or the content of nitrogen, phosphorus, potassium, calcium and magnesium in the dry matter of tomato leaves. Also, it did not affect the course of tomato fruiting, the quantity and the structure of the fruit yield or the fresh weight and the diameter of marketable fruits. However, the fruits harvested from the inoculated plants contained more total sugars, monosaccharides and L-ascorbic acid and the ir acidity was higher; however, the content of dry matter, total chlorophyll and carotenoids did not differ in comparison to control plants.