Described is a semiautomatic thresher machine. The machine is supported over a table (01), platform (01a) that has perforations for fastening and coupling modules of: transmission (03), start-up (04), drive (10), cut (20), ejector (30) and distribution (50). Devices: mandrel (13), for cutting (25) and aligning the corn (26). The invention is located in the Nice Classification 7 and 31. The modules and devices are designed for threshing 10 corns per minute (600/hrs) by an operator. The technique for performing this process consists in fastening the corn in the mandrel device (13), the driving module (10) is actuated by the start-up module (04) which rotates the corn when the cutting module (20) is closed, the blade (25a) performing the grain cut, the cutting module (20) being opened after the corn is threshed, the driving module (10) being deactivated and the ejecting module (30) activated, and the grain and the cob released by gravity to the distribution module (50), which receives an d separates with its two outlets (50b and 50c) the corn grain and the cob. The current technique is performed with a knife, which is a: dangerous, inefficient and anti-hygienic process, the inventive machine solving these problems.Máquina semiautomática desgranadora de elotes. Soportada en una mesa (01) una plataforma (01a) que cuenta con perforaciones para la sujeción y acoplamiento de: Módulos: de transmisión (03), encendido (04), impulsor (10), cortador (20), expulsor (30) y distribución (50). Dispositivos: Madrid (13), de corte (25) y alineador de elote (26). Ubicada en la clasificación de Niza 7 y 31. Los módulos y dispositivos están diseñados para que un operador con experiencia desgrane 10 elotes por minuto, (600/hrs.). La técnica para realizar este proceso consiste en sujetar el elote en el dispositivo mandril (13), por medio del modulo de encendido (04) se acciona el modulo impulsor (10) que hace girar el elote cuando el modulo cortador (20) está cerrado, la cuchilla (25a) rea
