These proceedings contain the papers presented at VisSym '03, the fifth Joint Visualization Symposium of the Eurographics Associate and the Technical Committee on Visualization and Graphics (TCVG) of the IEEE Computer Society. The Symposium was held May 26-28, 2003 in Grenoble, France at the IMAG Conference Center.There were 62 papers submitted from 11 countries. Each submission was anonymously reviewed by at least three 3 members of the International Program Committee. The decision of which papers to accept was difficult due to the high quality of submissions. This year, 30 papers were accepted for publication.