Portable guiding device for the practice of golf comprising a first fastening module, rigid or semi-rigid, with an inverted U shape, which is attached to the user's belt. Said first fastening module comprises attachment methods to a second arm module, which in turn comprises a retractable extendible system that is placed in a mouth of said second arm module. Said retractable arm, in turn, comprises a series of telescopic sub-arms that may be manually extended or retracted, depending on the user's needs, and concludes in a distal end which is placed in the mouth of an objective module, which is made of a soft material. The second arm module allows for different adjustment and angle degree variations.