A teppanyaki assembly includes a platform including a cooking plane, an air pump installed in the platform, and an air filter connected to the air pump. The air filter has a housing with an air room defined therein connecting to an air channel of the air pump and a filter screen slantwise disposed within the air room for increasing an area available for filtering air and oil fumes, thereby facilitating an increase in transient air flow, a decrease in wind resistance, and an efficient oil fumes interception to prevent the problem of air pollution. An additional arrangement of a cleaning door on the housing also allows the filter screen to be promptly taken out for following washing and maintaining proceedings, which increases the using convenience.