In our experiment, which was conducted in 2015, the effect of organic and mineral fertilizer on yield of bell pepper and some primary and secondary metabolites in bell pepper fruits were evaluated. The pot experiment was placed in the greenhouse and was designed as block experiment with three repetitions. Five treatments with different fertilizer were included: fertilization with organic fertilizer Organik (ORG1), and Stallatico (ORG2), fertilization with mineral fertilizer (MIN) and the combination of both types of fertilizers: (ORG1+WSF, ORG2+WSF). Measurements of some carpometric parameters and chemical compostions were performed. The highest yield was found in ORG1 treatment (98 t/ha), the lowest yield gave plants from control treatment (32 t/ha). Fertilization did not affect carpometric characteristics, but did have significant impact on some colour parameters: a*, b*, C* and h*. The highest content of total sugars was detected in fruits from ORG1 treatment (19,8 g/kg fresh weight (FW)), and the lowest in fruits from Stallatico +WSF treatment (18,1 g/kg FW). Among the sugars, the highest part belongs to glucose (51.6 %), followed by fructose (44.9 %), and sucrose (3.5 %). The highest amount of total acids was found in fruits from MIN treatment (2,7 g/kg FW), and the lowest in fruits from ORG2+WSF (2,2 g/kg FW). Fertilization with organic and mineral fertilizers did not affect the vitamin C content, neither the phenolic composition. The highest vitamin C content had fruits from MIN treatment (639.8 mg/kg FW), the lowest had fruits from ORG2 treatment (579,3 mg/kg FW). In fruits some fenolic compound were detected: chlorogenic acid (0.8-2.6 mg/kg FW), apygenin glycosi-des (1.8-4.9 mg/kg FW), luteolin glycosides (10.9-21.5 mg/kg FW) and quercetin glycosides (3.3-6.2 mg/kg FW).