Escalator/moving walkway modular truss comprising an upper module , a central module , and a lower module , each module comprising - a first side and a second side opposite to the first side , each side of the modules comprising in turn a lower profile and an upper profile , and - a soffit plate placed between both sides , - wherein the modules comprise - a plurality of vertical beams placed between the lower profile and the upper profile of each side , said vertical beams being vertical guide supports configured for supporting and positioning the guiding system of the escalator/moving walkway, - a plurality of diagonal beams between the lower profile and the upper profile of each side , - and a plurality of crossbars between both sides , each crossbar placed between a pair of opposite vertical guide supports , - wherein the lower profiles are a direct support for an outer cladding of the escalator/moving walkway, CHARACTERIZED IN THAT - each of the lower profiles includes several protuberances on both sides to allow connections, - wherein the upper profiles are a direct support for balustrades and outer decking profiles of the escalator/moving walkway, - each of the upper profiles has two differentiated parts, which are an upper part and a lower part, - wherein the upper part is wider than the lower part, - wherein the lower part is an open part being directly connected to the vertical beams and the diagonal beams with several protuberances to allow connections, and - wherein the upper part includes a plurality of shapes to connect the outer decking profile in an outer side and the balustrade in an inner side. - a first side and a second side opposite to the first side , each side of the modules comprising in turn a lower profile and an upper profile , and - a soffit plate placed between both sides , - wherein the modules comprise - a plurality of vertical beams placed between the lower profile and the upper profile of each side , said vertical beams being vertical guide supports configured for supporting and positioning the guiding system of the escalator/moving walkway, - a plurality of diagonal beams between the lower profile and the upper profile of each side , - and a plurality of crossbars between both sides , each crossbar placed between a pair of opposite vertical guide supports , - a plurality of vertical beams placed between the lower profile and the upper profile of each side , said vertical beams being vertical guide supports configured for supporting and positioning the guiding system of the escalator/moving walkway, - a plurality of diagonal beams between the lower profile and the upper profile of each side , - and a plurality of crossbars between both sides , each crossbar placed between a pair of opposite vertical guide supports , - wherein the lower profiles are a direct support for an outer cladding of the escalator/moving walkway, - each of the lower profiles includes several protuberances on both sides to allow connections, - wherein the upper profiles are a direct support for balustrades and outer decking profiles of the escalator/moving walkway, - each of the upper profiles has two differentiated parts, which are an upper part and a lower part, - wherein the upper part is wider than the lower part, - wherein the lower part is an open part being directly connected to the vertical beams and the diagonal beams with several protuberances to allow connections, and - wherein the upper part includes a plurality of shapes to connect the outer decking profile in an outer side and the balustrade in an inner side. <EOS>