A cooking appliance comprising: an appliance body including a cooking chamber to cook food; a door that opens and closes the cooking chamber, the door having cooling flow passages (A, B, C) that absorb heat transferred from the cooking chamber; an intake air duct that communicates with the cooling flow passages (A, B, C), the intake air duct being provided proximate a top side of the cooking chamber; an exhaust duct that communicates with the intake air duct, the exhaust duct being provided proximate the intake air duct; and a fan-motor assembly provided in a space formed by the intake air duct and the exhaust duct such that the fan-motor assembly forms a portion of a connecting passage that connects the intake air duct and the exhaust duct characterized in that the fan-motor assembly comprises: an intake air fan provided in the intake air duct; an exhaust fan provided in the exhaust duct; a bi-axial motor that drives the intake air fan and the exhaust fan; a fan housing that forms the connecting passage, and receives the exhaust fan and the intake air fan therein; a first flow guide surrounding the intake air fan having a rearwardly-opened structure to guide air discharged from the intake air fan toward the exhaust fan; a second flow guide surrounding the exhaust fan having a forwardly-opened structure to guide air discharged from the exhaust fan toward the exhaust duct; and a fan guide provided between the intake air fan and the exhaust fan, wherein the fan guide separates air introduced into the intake air fan and air introduced into the exhaust fan from each other. an appliance body including a cooking chamber to cook food; a door that opens and closes the cooking chamber, the door having cooling flow passages (A, B, C) that absorb heat transferred from the cooking chamber; an intake air duct that communicates with the cooling flow passages (A, B, C), the intake air duct being provided proximate a top side of the cooking chamber; an exhaust duct that communicates with the intake air duct, the exhaust duct being provided proximate the intake air duct; and a fan-motor assembly provided in a space formed by the intake air duct and the exhaust duct such that the fan-motor assembly forms a portion of a connecting passage that connects the intake air duct and the exhaust duct characterized in that the fan-motor assembly comprises: an intake air fan provided in the intake air duct; an exhaust fan provided in the exhaust duct; a bi-axial motor that drives the intake air fan and the exhaust fan; a fan housing that forms the connecting passage, and receives the exhaust fan and the intake air fan therein; a first flow guide surrounding the intake air fan having a rearwardly-opened structure to guide air discharged from the intake air fan toward the exhaust fan; a second flow guide surrounding the exhaust fan having a forwardly-opened structure to guide air discharged from the exhaust fan toward the exhaust duct; and a fan guide provided between the intake air fan and the exhaust fan, wherein the fan guide separates air introduced into the intake air fan and air introduced into the exhaust fan from each other. an intake air fan provided in the intake air duct; an exhaust fan provided in the exhaust duct; a bi-axial motor that drives the intake air fan and the exhaust fan; a fan housing that forms the connecting passage, and receives the exhaust fan and the intake air fan therein; a first flow guide surrounding the intake air fan having a rearwardly-opened structure to guide air discharged from the intake air fan toward the exhaust fan; a second flow guide surrounding the exhaust fan having a forwardly-opened structure to guide air discharged from the exhaust fan toward the exhaust duct; and a fan guide provided between the intake air fan and the exhaust fan, wherein the fan guide separates air introduced into the intake air fan and air introduced into the exhaust fan from each other.