A components (17) packaging structure for pharmaceutical containers, comprising at least one tray (10), which has at least one open side for introducing and extracting at least one supporting shelf (11) which is parallel to a bottom plane (14) of the tray (10) and which rests in correspondence of the inner walls (15) of the tray (10); said supporting shelf (11) has a spatially predetermined distribution of first seats or cavities (13) within which closing components and/or generic accessories of said containers, such as rubber caps (17), nuts (20) with crimping snap or other types of sealing nuts and/or caps, are placed, so that the vertical axis of each closure component is perpendicular to said bottom plane (14) of the tray (10), said structure thus constituting a guarantee of sterility and cleanliness of said closing components and/or generic accessories which are inserted in said seats or cavities (13).