An electric oven comprising: an oven main body forming a cavity in which food is received; and a convection assembly provided to protrude from one surface of the cavity and configured to suck and remove contaminants generated when cooking the food and to heat an inside of the cavity, wherein the convection assembly comprises, a cover case (30, 130) protruding from the one surface of the cavity, the cover case (30, 130) including a front surface (31, 131) spaced apart from the one surface of the cavity and having an inlet port (32, 132) and a side surface (33, 133) extending from the front surface (31, 131) to the one surface of the cavity and having outlet ports (34, 134); a convection fan provided inside the cover case (30, 130), the convection fan configured to allow air containing the contaminants to be sucked into the cover case (30, 130) through the inlet port (32, 132) and to be discharged through the outlet ports (34, 134); the oven being characterized by: a convection heater (50, 50') configured to heat the air sucked into the cover case (30, 130) by the convection fan to a predetermined temperature to burn the contaminants contained in the air; a barrier disposed between the convection heater (50, 50') and the side surface (33, 133) of the cover case (30, 130) and including a fixed portion fixed to the one surface of the cavity and an inclined portion formed to be inclined upward from the fixed portion, wherein the air discharged by the convection fan collides with the barrier and then is discharged through the outlet ports (34, 134) in an upward inclined direction with respect to the one surface of the cavity. an oven main body forming a cavity in which food is received; and a convection assembly provided to protrude from one surface of the cavity and configured to suck and remove contaminants generated when cooking the food and to heat an inside of the cavity, wherein the convection assembly comprises, a cover case (30, 130) protruding from the one surface of the cavity, the cover case (30, 130) including a front surface (31, 131) spaced apart from the one surface of the cavity and having an inlet port (32, 132) and a side surface (33, 133) extending from the front surface (31, 131) to the one surface of the cavity and having outlet ports (34, 134); a convection fan provided inside the cover case (30, 130), the convection fan configured to allow air containing the contaminants to be sucked into the cover case (30, 130) through the inlet port (32, 132) and to be discharged through the outlet ports (34, 134); the oven being characterized by: a convection heater (50, 50') configured to heat the air sucked into the cover case (30, 130) by the convection fan to a predetermined temperature to burn the contaminants contained in the air; a barrier disposed between the convection heater (50, 50') and the side surface (33, 133) of the cover case (30, 130) and including a fixed portion fixed to the one surface of the cavity and an inclined portion formed to be inclined upward from the fixed portion, wherein the air discharged by the convection fan collides with the barrier and then is discharged through the outlet ports (34, 134) in an upward inclined direction with respect to the one surface of the cavity. a convection heater (50, 50') configured to heat the air sucked into the cover case (30, 130) by the convection fan to a predetermined temperature to burn the contaminants contained in the air; a barrier disposed between the convection heater (50, 50') and the side surface (33, 133) of the cover case (30, 130) and including a fixed portion fixed to the one surface of the cavity and an inclined portion formed to be inclined upward from the fixed portion, wherein the air discharged by the convection fan collides with the barrier and then is discharged through the outlet ports (34, 134) in an upward inclined direction with respect to the one surface of the cavity.