Device for dispensing a product for dyeing and/or lightening keratin fibres comprising an associative polymer The present invention relates to a device for dispensing a product for dyeing and/or lightening keratin fibres constituted of a container comprising: i) at least two compartments a and b separate from one another, the compartment a comprising a composition A comprising at least one alkaline agent and optionally at least one dyeing agent, the compartment b comprising an oxidizing composition B comprising at least one chemical oxidizing agent, one and/or the other of the compositions of the two compartments comprising at least one associative thickening polymer ii)a dispensing means equipped with at least one dispensing orifice, in communication with the compartments a and b, making it possible to simultaneously deliver the compositions A and B. It also relates to a process for dyeing human keratin fibres using said device, and also to a kit comprising said device and a composition comprising a conditioning agent.Linvention concerne un dispositif de distribution dun produit de coloration et/ou déclaircissement de fibres kératiniques constitué dun contenant comprenant : i) au moins deux compartiments (a) et (b) séparés lun de lautre, le compartiment (a) comprenant une composition (A) comprenant au moins un agent alcalin et éventuellement au moins un agent colorant, le compartiment (b) comprenant une composition doxydation (B) comprenant au moins un agent doxydation chimique, lune et/ou lautre des compositions des deux compartiments comprenant au moins un polymère épaississant associatif ii) un moyen de distribution équipé dau moins un orifice de distribution, en communication avec les compartiments (a) et (b), rendant possible la distribution simultanée des compositions (A) et (B). Linvention concerne également un processus permettant de colorer des fibres kératiniques humaines à laide dudit dispositif, ainsi quun kit comprenant ledit dispositif et une composi
