Abstract: The present invention relates to methods and pharmaceutical composition for treating inflammatory diseases. Inflammation is a defence response to tissue damage or infections that requires tight regulation to prevent impaired healing and to avoid excessive damage and/or autoimmunity. Myeloid cells, including macrophages play a key role in tissue repair and undergo major functional changes during the healing processes, switching from an inflammatory state to a pro-repair phenotype. The inventors have found that TAFA4, a chemokine-like protein, has anti-inflammatory and pro-repair properties. This molecule regulates the phenotype of man monocytes and macrophages by promoting their anti-inflammatory and pro-repair functions. TAFA4 increases macrophage their phagocytic capacities and their production of the anti-inflammatory cytokine IL-10. By contrast, TAFA4 down-regulates the production of the pro-inflammatory cytokines IL-6, IL-113, and TNF-? by human macrophages.