A conductive thermoplastic elastomer composition comprising: at least one elastomer component selected from the group consisting of elastomeric polymers each of which has a side chain (a) containing a hydrogen-bond cross-linkable moiety having a carbonyl-containing group and/or a nitrogen-containing heterocycle and has a glass-transition point of 25°C or below, and elastomeric polymers each of which contains a hydrogen-bond cross-linkable moiety and a covalent-bond cross-linking moiety in a side chain and has a glass-transition point of 25° C or below, wherein the glass-transition point is measured by differential scanning calorimetry at a rate temperature of 10°C/min; a clay; a paraffin oil; and a carbon-based filler having a BET specific surface area of 50 m 2 /g or more, wherein a content ratio of the clay is 20 parts by mass or less relative to 100 parts by mass of the elastomer component, a content ratio of the paraffin oil is 1 to 65% by mass relative to a total amount of the composition, a content ratio of the carbon-based filler is 0.1 to 50% by mass relative to the total amount of the composition, the elastomer component is at least one selected from the group consisting of reaction products of an elastomeric polymer having a cyclic acid anhydride group in a side chain with at least one compound among triazoles having at least one substituent selected from hydroxy groups, thiol groups, and amino groups, pyridines having at least one substituent selected from hydroxy groups, thiol groups, and amino groups, thiadiazoles having at least one substituent selected from hydroxy groups, thiol groups, and amino groups, imidazoles having at least one substituent selected from hydroxy groups, thiol groups, and amino groups, isocyanurates having at least one substituent selected from hydroxy groups, thiol groups, and amino groups, triazines having at least one substituent selected from hydroxy groups, thiol groups, and amino groups, tris(hydroxyethyl) isocyanurates. at least one elastomer component selected from the group consisting of elastomeric polymers each of which has a side chain (a) containing a hydrogen-bond cross-linkable moiety having a carbonyl-containing group and/or a nitrogen-containing heterocycle and has a glass-transition point of 25°C or below, and elastomeric polymers each of which contains a hydrogen-bond cross-linkable moiety and a covalent-bond cross-linking moiety in a side chain and has a glass-transition point of 25° C or below, wherein the glass-transition point is measured by differential scanning calorimetry at a rate temperature of 10°C/min; a clay; a paraffin oil; and a carbon-based filler having a BET specific surface area of 50 m 2 /g or more, wherein a content ratio of the clay is 20 parts by mass or less relative to 100 parts by mass of the elastomer component, a content ratio of the paraffin oil is 1 to 65% by mass relative to a total amount of the composition, a content ratio of the carbon-based filler is 0.1 to 50% by mass relative to the total amount of the composition, the elastomer component is at least one selected from the group consisting of reaction products of an elastomeric polymer having a cyclic acid anhydride group in a side chain with at least one compound among triazoles having at least one substituent selected from hydroxy groups, thiol groups, and amino groups, pyridines having at least one substituent selected from hydroxy groups, thiol groups, and amino groups, thiadiazoles having at least one substituent selected from hydroxy groups, thiol groups, and amino groups, imidazoles having at least one substituent selected from hydroxy groups, thiol groups, and amino groups, isocyanurates having at least one substituent selected from hydroxy groups, thiol groups, and amino groups, triazines having at least one substituent selected from hydroxy groups, thiol groups, and amino groups, tris(hydroxyethyl) isocyanurates.