A fluid-product dispensing assembly comprising: - a first fluid-product dispenser comprising a first reservoir, a first dispensing member, such as a pump, provided with a first dispensing head and a first pusher, and - a second fluid-product dispenser (2; 2'; 2ab; 2c) comprising a second reservoir (21; 21'; 21c), a second dispensing member, such as a pump, provided with a second dispensing head and a second pusher, the second dispenser (2; 2'; 2ab; 2c) being removably mounted on the first dispenser so as to prevent actuation of one of the two dispensers, characterised in that the capacity of the second reservoir (21; 21'; 21c) of the second dispenser (2; 2'; 2ab; 2c) is much smaller than that of the first reservoir of the first dispenser, the second dispenser (2; 2'; 2ab; 2c) comprising an outer shell which is largely open at its lower end and has a notch for the passage of the second pusher, as well as a window for a dispensing orifice, the second dispenser (2; 2'; 2ab; 2c) also comprising an insert part (28; 28'; 28a; 28c) which is engaged inside the outer shell (27; 27'; 27a; 27c) and which forms with the outer shell (27; 27'; 27a; 27c) an inner space (281; 281'; 281a) in which the second reservoir (21; 21'; 21c) is disposed, as well as a receiving housing (282; 282'; 282a) in which the dispensing member of the first dispenser is received, the second dispenser (2; 2'; 2ab; 2c) being integrated with the shape of the first dispenser, and in particular with the shape of the first reservoir, such that the second dispenser (2; 2'; 2ab; 2c) can be likened to a simple protective cover which covers the upper part of the first dispenser, only the opening and the window making it possible to understand that this particular cover acts as a dispenser. - a first fluid-product dispenser comprising a first reservoir, a first dispensing member, such as a pump, provided with a first dispensing head and a first pusher, and - a second fluid-product dispenser (2; 2'; 2ab; 2c) comprising a second reservoir (21; 21'; 21c), a second dispensing member, such as a pump, provided with a second dispensing head and a second pusher, the second dispenser (2; 2'; 2ab; 2c) being removably mounted on the first dispenser so as to prevent actuation of one of the two dispensers, characterised in that the capacity of the second reservoir (21; 21'; 21c) of the second dispenser (2; 2'; 2ab; 2c) is much smaller than that of the first reservoir of the first dispenser, the second dispenser (2; 2'; 2ab; 2c) comprising an outer shell which is largely open at its lower end and has a notch for the passage of the second pusher, as well as a window for a dispensing orifice, the second dispenser (2; 2'; 2ab; 2c) also comprising an insert part (28; 28'; 28a; 28c) which is engaged inside the outer shell (27; 27'; 27a; 27c) and which forms with the outer shell (27; 27'; 27a; 27c) an inner space (281; 281'; 281a) in which the second reservoir (21; 21'; 21c) is disposed, as well as a receiving housing (282; 282'; 282a) in which the dispensing member of the first dispenser is received, the second dispenser (2; 2'; 2ab; 2c) being integrated with the shape of the first dispenser, and in particular with the shape of the first reservoir, such that the second dispenser (2; 2'; 2ab; 2c) can be likened to a simple protective cover which covers the upper part of the first dispenser, only the opening and the window making it possible to understand that this particular cover acts as a dispenser.