Connection device having - at least one basic component which has a plurality of fluid passage points (P' 1, P' 2, P' 3, P' n..... P' x) adjacent to each other, - a basic body which is used to control a fluid flow via a functional component in the form of a valve device, wherein the basic body has a plurality of further fluid passage points (P 1, P 2, P 3, P n..... P x) which are connected to the associated fluid passage points (P' 1, P' 2, P' 3, P' n..... P' x) in the basic component and to each other in a fluid-conducting manner, wherein the basic body (12 has at least one blocking part which can shut off the respective fluid passage point in the basic component and/or in the basic body, said fluid passage point remaining unaffected by the functional component, wherein within the basic body, between the further fluid passage points (P 1, P 2, P 3, P n..... P x) and the functional component, there is in each case a fluid-conducting connecting line (30, 32) which can be shut off by a separate blocking part, provided that this connection to the functional component remains unused, wherein the respective connecting lines consist of a central line, into which the functional component is connected, and individual line sections which establish a connection between this central line and the respective associated further fluid passage point (P 1, P 2, P 3, P n..... P x), wherein only one fluid-conducting line section leads via the central line to the input side of the functional component and in turn only one fluid-conducting line section is connected via the central line on the output side of the functional component, and wherein, on the output side of the functional component, the functional component is connected into the central line upstream of the last line section leading out of the basic body. - at least one basic component which has a plurality of fluid passage points (P' 1, P' 2, P' 3, P' n..... P' x) adjacent to each other, - a basic body which is used to control a fluid flow via a functional component in the form of a valve device, wherein the basic body has a plurality of further fluid passage points (P 1, P 2, P 3, P n..... P x) which are connected to the associated fluid passage points (P' 1, P' 2, P' 3, P' n..... P' x) in the basic component and to each other in a fluid-conducting manner, wherein the basic body (12 has at least one blocking part which can shut off the respective fluid passage point in the basic component and/or in the basic body, said fluid passage point remaining unaffected by the functional component, wherein within the basic body, between the further fluid passage points (P 1, P 2, P 3, P n..... P x) and the functional component, there is in each case a fluid-conducting connecting line (30, 32) which can be shut off by a separate blocking part, provided that this connection to the functional component remains unused, wherein the respective connecting lines consist of a central line, into which the functional component is connected, and individual line sections which establish a connection between this central line and the respective associated further fluid passage point (P 1, P 2, P 3, P n..... P x), wherein only one fluid-conducting line section leads via the central line to the input side of the functional component and in turn only one fluid-conducting line section is connected via the central line on the output side of the functional component, and wherein, on the output side of the functional component, the functional component is connected into the central line upstream of the last line section leading out of the basic body.