A boat boarding device for use in combination with the side or transom of a boat, the device hingedly connects with the boat, can be pivoted downwardly into the water, adjusted by an adjustment device for maintaining its horizontal stability, and in addition, floatation devices may be employed, with the side framework of the device, for maintaining the device in a horizontal position upon the water during usage and application. A perforated platform is arranged along the bottom framework of the device, and a step, associated with the bottom platform, allows for stepping from the boat, onto the platform, to facilitate movement into the water, or for returning from the water into the boat.