The subject of the invention is a first aid kit into bicycle handlebars that comprises a compression storage portion, wherein the compression storage portion defines a space adapted for storing objects and an elongated retraction element attached to one end of the compression storage portion, wherein the other end of the compression storage portion is provided with a plug. The plug can be used to fix the compression storage portion in the handlebars and to define a clearance between the first aid kit and the handlebars. The retraction element (e.g., a string or a cord) can be used for retracting the compression storage portion into the handlebars. Furthermore, the first aid kit can comprise a firm storage portion which can provide an additional storage space.