D-Bus是一个行程间通信及远程过程调用机制，可以让多个不同的计算机进程（即行程）在同一台电脑上同时进行通信。D-Bus作为freedesktop.org专案的一部份，其设计目的是使Linux桌面环境（如GNOME与KDE等）提供的服务标准化。

freedesktop.org专案同时也开发了一个称为libdbus的自由及开放源代码软件函式库，作为规范的参考实作。这个函式库常与D-Bus本身混淆。也存在着其他的D-Bus实作，像是GDBus (GNOME)，QtDBus (Qt/KDE)，dbus-java以及sd-bus（systemd的一部份）。

In computing, D-Bus or DBus is an inter-process communication (IPC) and remote procedure call (RPC) mechanism that allows communication between multiple computer programs (that is, processes) concurrently running on the same machine. D-Bus was developed as part of the freedesktop.org project, initiated by Havoc Pennington from Red Hat to standardize services provided by Linux desktop environments such as GNOME and KDE.