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 positioned outside the cooking compartment and provided on the door , a camera module positioned inside the housing to take an image of an inside of the cooking compartment through the transparent portion , the camera module being pivotable inside the housing 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 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 positioned outside the cooking compartment and provided on the door , a camera module positioned inside the housing to take an image of an inside of the cooking compartment through the transparent portion , the camera module being pivotable inside the housing 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 positioned outside the cooking compartment and provided on the door , a camera module positioned inside the housing to take an image of an inside of the cooking compartment through the transparent portion , the camera module being pivotable inside the housing 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 to change an angle at which the image of the inside of the cooking compartment is captured. <EOS>