PROBLEM TO BE SOLVED: To provide a medical apparatus having a function of eliminating an attachment sticking to an observation window of an imaging apparatus retained and fixed in the body to observe a site to be examined, and suppressing deterioration in eliminating performance.SOLUTION: The medical apparatus 1 introduced into the body includes: an imaging means disposed in outer parts 2a, 2b, 3 to image the interior of the body through the observation window 3a a fixing means for fixing the outer parts 2a, 2b, 3 to the body wall an attachment eliminating means 4 turnably disposed at the outer parts 2a, 2b, 3 and including a wiping means for eliminating the attachment sticking to the observation window 3a a driving means for driving to turn the attachment eliminating means 4 and a performance maintaining means 60 disposed in a region outside the observation window 3a to suppress a fall in stain removing performance of the attachment eliminating means 4.
