A 3D ductile-notched connection for timber concrete composite beams is proposed in this study. The innovation of the proposed connector is the particular geometry of the notch. This configuration on one hand generates three shear planes instead of one as typical notched connection and on the other hand provides a mechanical locking to limit the uplift without the need for metallic screws. This paper presents an experimental investigation on the behaviour of the newly proposed notched connector. Three pushout tests were performed. The results show high strength and stiffness as well as ductility, as the failure mode was governed by local crashing of the timber. In addition, one flexural test was carried out on the beam specimen. The mode of failure was governed by flexural failure of the timber beam. The analysis of the slip and the uplift demonstrated the effectiveness of the connectors.