PROBLEM TO BE SOLVED: To provide a water filtering device with an illumination part for a water tank used in rearing and appreciating animals such as fishes and growing and appreciating plants, which has both a water filtering function and an illumination function, and can mount the functional parts collectively in the water tank in a compact manner.SOLUTION: A water filtering device 10 with an illumination part includes: integrally constructed water filtering part 1 and illumination part； and a mounting part 3 for mounting the parts in a water tank. The water filtering part 1 includes: a water filtering chamber 11； a water intake part 12； and a filtered water discharge part 13, wherein the water intake part 12 has a pump disposing part 121. The mounting part 3 can mount the integrally constructed water filtering part 1 and illumination part 2 in the tank so that the water filtering part 1 is disposed inside the water tank as viewed from the plane, and the illumination part 2 is projected from the water filtering part 1 so that the water tank can be illuminated from above in front of the water filtering part 1.【課題】魚等の動物の飼育や観賞、植物の育成や観賞等に用いられる水槽のための水濾過装置であって、水濾過機能及び照明機能を併せもち、それら機能部分を一括して水槽にコンパクトに装着できる照明部付の水濾過装置を提供する。【解決手段】一体的に構成された水濾過部１及び照明部２並びにそれらを水槽に装着する装着部３を含んでいる照明部付水濾過装置１０。水濾過部１は水濾過室１１、取水部１２及び濾過後水の放出部１３を含んでおり、取水部１２はポンプ配置部１２１を有している。装着部３は、水濾過部１が平面からみて水槽内側に配置されるように、一体的に構成された水濾過部１及び照明部２を水槽に装着でき、照明部２は水槽内を水濾過部１の前方で上方から照明可能に水濾過部１から突出している。【選択図】図９
