An information processing apparatus comprising: a content information set generation unit configured to generate a content information set (620, 720, 820, 920) including a series of content information pieces (621a-d) in a predetermined arrangement sequence, the content information pieces being displayed in a predetermined area on a display screen (610, 710, 810, 910); an update detection unit configured to detect one or more updated content information pieces that have never been displayed on the display screen (610, 710, 810, 910) from among the content information pieces constituting the content information set; an indicator generation unit configured to generate an indicator (630, 730, 830, 930) on the basis of the information on the content information set generated by the content information set generation unit and the information on the updated content information piece detected by the update detection unit; and a display control unit configured to display, on the display screen (610, 710, 810, 910), at least a part of the content information set in the arrangement sequence in a first direction and the indicator (630, 730, 830, 930), wherein the indicator (630, 730, 830, 930) has a linear shape stretching in the first direction and includes, in a way different from each other, a display part marking area (631, 731, 831, 931) that indicates a positional relation of a display part with respect to the whole content information set (620, 720, 820, 920), the display part corresponding to the content information piece displayed on the display screen (610, 710, 810, 910) from among the content information set (620, 720, 820, 920), an updated part marking area (633, 733, 833, 933a-c) that indicates a positional relation of an updated part with respect to the whole content information set (620, 720, 820, 920), the updated part corresponding to the one or more updated content information pieces from among the content information set, and a read part marking area (632, 732a-b, 832a-b, 932a-d) that indicates a positional relation of a read part with respect to the whole content information set (620, 720, 820, 920), the read part corresponding to the one or more content information pieces that are not included in any of the display part and the updated part from among the content information set (620, 720, 820, 920). a content information set generation unit configured to generate a content information set (620, 720, 820, 920) including a series of content information pieces (621a-d) in a predetermined arrangement sequence, the content information pieces being displayed in a predetermined area on a display screen (610, 710, 810, 910); an update detection unit configured to detect one or more updated content information pieces that have never been displayed on the display screen (610, 710, 810, 910) from among the content information pieces constituting the content information set; an indicator generation unit configured to generate an indicator (630, 730, 830, 930) on the basis of the information on the content information set generated by the content information set generation unit and the information on the updated content information piece detected by the update detection unit; and a display control unit configured to display, on the display screen (610, 710, 810, 910), at least a part of the content information set in the arrangement sequence in a first direction and the indicator (630, 730, 830, 930), wherein the indicator (630, 730, 830, 930) has a linear shape stretching in the first direction and includes, in a way different from each other, a display part marking area (631, 731, 831, 931) that indicates a positional relation of a display part with respect to the whole content information set (620, 720, 820, 920), the display part corresponding to the content information piece displayed on the display screen (610, 710, 810, 910) from among the content information set (620, 720, 820, 920), an updated part marking area (633, 733, 833, 933a-c) that indicates a positional relation of an updated part with respect to the whole content information set (620, 720, 820, 920), the updated part corresponding to the one or more updated content information pieces from among the content information set, and a read part marking area (632, 732a-b, 832a-b, 932a-d) that indicates a positional relation of a read part with respect to the whole content information set (620, 720, 820, 920), the read part corresponding to the one or more content information pieces that are not included in any of the display part and the updated part from among the content information set (620, 720, 820, 920). a display part marking area (631, 731, 831, 931) that indicates a positional relation of a display part with respect to the whole content information set (620, 720, 820, 920), the display part corresponding to the content information piece displayed on the display screen (610, 710, 810, 910) from among the content information set (620, 720, 820, 920), an updated part marking area (633, 733, 833, 933a-c) that indicates a positional relation of an updated part with respect to the whole content information set (620, 720, 820, 920), the updated part corresponding to the one or more updated content information pieces from among the content information set, and a read part marking area (632, 732a-b, 832a-b, 932a-d) that indicates a positional relation of a read part with respect to the whole content information set (620, 720, 820, 920), the read part corresponding to the one or more content information pieces that are not included in any of the display part and the updated part from among the content information set (620, 720, 820, 920).