Evaluation of the intratumor environment, such as cell distribution and vessel structure, are important for understanding the characteristics of tumors. In particular, the vessel structure and its permeability is critical for the malignant potential of the tumor and drug-targeting. The purpose of this work was to non-invasively visualize intratumoral vessels using MR micro-angiography (MRmA) and a liposomal contrast agent having long blood half-life. In addition, we tried to identify differences in the vascular structures for Colon26 and SU-DHL6 cells. The proposed method visualized the intratumoral vessels clearly and revealed differences in the structure depending on the cell type.