An oven comprising: a case; a cooking compartment provided in the case; a door provided to open and close the cooking compartment and provided to be separable from the case, the door comprising a transparent portion configured to allow the cooking compartment to be seen from outside the oven; and a monitoring unit which comprises: a housing (140, 150) positioned outside the cooking compartment and provided on the door, a camera module positioned inside the housing (140, 150) to take an image of an inside of the cooking compartment through the transparent portion, the camera module being pivotable inside the housing (140, 150) and disposed obliquely with respect to the door and facing the cooking compartment through the transparent portion, and a pivoting member configured to allow the camera module to pivot up and down according to an image-taking angle of up to 60 degrees and left and right according to an image-taking angle of up to 100 degrees, wherein the monitoring unit is disposed at a position which allows the image of the inside of the cooking compartment to be taken based on the image-taking angle of the camera module, the camera module is disposed to be inclined with respect to an inner surface of the door to allow the inside of the cooking compartment to be within the image-taking angle, and the camera module is pivotable inside the housing (140, 150) to change an angle at which the image of the inside of the cooking compartment is captured. a case; a cooking compartment provided in the case; a door provided to open and close the cooking compartment and provided to be separable from the case, the door comprising a transparent portion configured to allow the cooking compartment to be seen from outside the oven; and a monitoring unit which comprises: a housing (140, 150) positioned outside the cooking compartment and provided on the door, a camera module positioned inside the housing (140, 150) to take an image of an inside of the cooking compartment through the transparent portion, the camera module being pivotable inside the housing (140, 150) and disposed obliquely with respect to the door and facing the cooking compartment through the transparent portion, and a pivoting member configured to allow the camera module to pivot up and down according to an image-taking angle of up to 60 degrees and left and right according to an image-taking angle of up to 100 degrees, a housing (140, 150) positioned outside the cooking compartment and provided on the door, a camera module positioned inside the housing (140, 150) to take an image of an inside of the cooking compartment through the transparent portion, the camera module being pivotable inside the housing (140, 150) and disposed obliquely with respect to the door and facing the cooking compartment through the transparent portion, and a pivoting member configured to allow the camera module to pivot up and down according to an image-taking angle of up to 60 degrees and left and right according to an image-taking angle of up to 100 degrees, wherein the monitoring unit is disposed at a position which allows the image of the inside of the cooking compartment to be taken based on the image-taking angle of the camera module, the camera module is disposed to be inclined with respect to an inner surface of the door to allow the inside of the cooking compartment to be within the image-taking angle, and the camera module is pivotable inside the housing (140, 150) to change an angle at which the image of the inside of the cooking compartment is captured.