Abstract: The present invention provides a modular sofa includes: at least one pull-out sofa bed module, and at least one module of a single seat module, a corner seat module, an ottoman module, and a love seat module. Various modules are connected to each other through a second type of connecting member. The pull-out sofa bed module includes a second base portion, a second backrest portion, and a pull-out portion, where the second backrest portion is configured to provide leaning support for a user, the pull-out portion may be extended and retracted relative to the second base portion, when the pull-out portion is pulled into the second base portion, the pull-out sofa bed module is used as a sofa, and when the pull-out portion is pulled out of the second base portion, the pull-out sofa bed module is used as a sofa bed.