Disclosed is a tray supporting apparatus for a dishwasher, the apparatus comprising: a support frame, two opposite sides of the support frame being respectively provided with a slide groove, and each slide groove comprising a first slideway a second slideway and the third slideway spaced apart from one another; a first and second bracket respectively adapted to support a tray, the first bracket and the second bracket being respectively provided on the support frame, wherein first ends of the first bracket and the second bracket are respectively slidably accommodated in the first slideway, a second end of the first bracket is slidably accommodated in the second slideway, and a second end of the second bracket is slidably accommodated in the third slideway.