Venus Sample Return Mission - Conceptual Solar System Exploration Mission Despite several previous missions and decades of researches, the Earth's planetary neighbour, Venus, remains a mysterious reality with many fundamental questions about the evolution of its atmosphere and climate, the composition of its surface and the materials beneath it, the interactions between this two systems, the atmosphere and the surface, and the presence of any forms of life. A new mission concept that employs an atmospheric entry lander and a back-to-Earth vehicle to return both atmospheric and surface samples can answer many of these questions. Therefore, the main purpose of this thesis is to present a new concept of a Venus Sample Return Mission, developed with the collaboration of the CRASH Lab of the New York State University at Buffalo, that fully satisfies a list of requirements given by NASA-JPL, describing step by step both the mathematical calculations and the model concepts that have been derived and created to design the main systems and subsystems of the landing vehicle..