A portable information processing apparatus comprising: an image display section ; stereo sound output sections ; a pair of vibration sections provided on a left side and a right side of a main body of the portable information processing apparatus with respect to a center of the image display section; and a control section including: sound control means for generating sound signals to be output to the stereo sound output sections, and outputting the sound signals; vibration control means for generating vibration signals for vibrating the pair of vibration sections by vibrations, each having a plurality of frequency components, and outputting the vibration signals; and image control means for controlling an image to be displayed on the image display section, characterized in that , the image control means is adapted to display, on the image display section, at least one object moving from a corresponding position in a virtual world displayed on the image display section to a corresponding position in the virtual world outside the display area and/or moving from the corresponding position in the virtual world outside the display area to the corresponding position in the virtual world displayed on the image display section, and even if the object is placed at the corresponding position in the virtual world outside the display area, the vibration control means is adapted to simultaneously vibrate the pair of vibration sections based on distribution of intensities of vibrations corresponding to the placement position of the object, thereby causing a user to perceive the placement position as the vibration source based on the vibrations of the vibration sections. an image display section ; stereo sound output sections ; a pair of vibration sections provided on a left side and a right side of a main body of the portable information processing apparatus with respect to a center of the image display section; and a control section including: sound control means for generating sound signals to be output to the stereo sound output sections, and outputting the sound signals; vibration control means for generating vibration signals for vibrating the pair of vibration sections by vibrations, each having a plurality of frequency components, and outputting the vibration signals; and image control means for controlling an image to be displayed on the image display section, characterized in that , sound control means for generating sound signals to be output to the stereo sound output sections, and outputting the sound signals; vibration control means for generating vibration signals for vibrating the pair of vibration sections by vibrations, each having a plurality of frequency components, and outputting the vibration signals; and image control means for controlling an image to be displayed on the image display section, characterized in that , the image control means is adapted to display, on the image display section, at least one object moving from a corresponding position in a virtual world displayed on the image display section to a corresponding position in the virtual world outside the display area and/or moving from the corresponding position in the virtual world outside the display area to the corresponding position in the virtual world displayed on the image display section, and even if the object is placed at the corresponding position in the virtual world outside the display area, the vibration control means is adapted to simultaneously vibrate the pair of vibration sections based on distribution of intensities of vibrations corresponding to the placement position of the object, thereby causing a user to perceive the placement position as the vibration source based on the vibrations of the vibration sections. <EOS>