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The objective of our work is to study the viscosimetric and the rheological behaviors of new epoxy resin namely: Tetraglycidyl ether urea of bisphenol A (TGEUBA) and its composite. Furthermore, we determined the viscosity of (TGEUBA/Methanol) system using the viscosimeter VB-1423 Ubbelohd capillary type. Besides, the viscosity of epoxy resin TGEUBA crosslinked by methylene dianiline (TGEUBA/MDA) and the rheological properties of different composite (TGEUBA/MDA/TGEMDA + TSP) formulated by two charges such as tetraglycidyl ether of methylene dianiline (TGEMDA) and trisodium phosphate (TSP) at various percentages (0%, 10% and 15%) were determined using the RHM01-RD HAAKE rheometer. Keywords: Epoxy resin, TGEUBA, Composite, Viscosity, Rheology