Ergonomic rollerball pen and cartridge for beginner writers and students aged 6 and up. The first rollerball pen with an ergonomic design is specifically developed for both left- and right-handed users. The grip zone is made of non-slip material, allowing for relaxed handling and helping to prevent early muscle fatigue and pain while writing. The lightweight writing guidance ensures a clean writing experience, as it does not smudge or scratch. Each new cartridge includes a writing tip that guarantees easy refilling. The rollerball pen can be refilled with royal blue erasable school ink, black, or red ink. The cartridges are available in two line widths: 0.3 mm (fine) in blue for finer writing and 0.5 mm (medium) in blue, black, and red. Additionally, the rollerball pen features a field for name labeling, and the cap at the end of the pen is removable.