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The objective of the research was to study the effect of corn (Zea mays) as a system associated with the cultivation of cocoa (Theobroma cacao) in the Lodana parish of the Santa Ana canton. The experimental design of Complete Random Blocks (DBCA) with three repetitions in a 3 x 8 factorial arrangement, where the factors were (A) the corn hybrids (INIAP H-601, 602 and 603), (B) the cocoa clones [EET-800, 801, 450, 454, 575, 576, 103, CCN-51 (control)]. The response variables evaluated were: male and female flowering, root and stem lodging, foliar diseases, plant height and ear insertion, number / plants / plot, ear length and diameter, % rotten ears, number / row of grain per ear, weight of 1000 grains, yield and prolificacy. For cocoa, the response variables were: Plant height at 20 cm, stem diameter and plant cover, which is obtained through "CANOPEO" a tool that allows to follow the growth of crops by calculating the plant cover fraction. The results showed that the highest production and productivity of maize associated with cocoa was the INIAP H-601 hybrid with a yield of 1.59 t / ha. And prolificacy of 1.51 in an average of two ears per plant. In addition, it had the lowest percentage of rotten ears. The influence of corn on cacao growth was positive, which was evidenced by plant height, with the EET-800 cacao clone the one that reached the highest height with 37.37 cm, while the lowest was for the CCN-51 clone (control) with 22.73 cm. The crown cover had a positive growth for the cocoa clone EET-801 with an average of 36.51%. [ABSTRACT FROM AUTHOR]