A semi-aromatic polyamide resin comprising: dicarboxylic acid units in which 50 to 100 mol% of the dicarboxylic acid units are aromatic dicarboxylic acid units; and diamine units in which 60 to 100 mol% of the diamine units are aliphatic diamine units having 9 to 13 carbon atoms, wherein at least 10% of terminal groups of molecular chains of the semi-aromatic polyamide resin are blocked with a terminal-blocking agent, wherein an amount of terminal amino groups of the molecular chains is 60 μeq/g or more and 120 μeq/g or less, and wherein the following inequality is satisfied: NH 2 / COOH ≥ 6 where [NH 2] (μeq/g) represents the amount of the terminal amino groups determined by titration of a sample solution of 1 g of a semi-aromatic polyamide resin dissolved in 35 ml of phenol, to which 2 ml of methanol was added, using 0.01 N aqueous hydrochloric acid with thymol blue as an indicator, and [COOH] (μeq/g) represents an amount of terminal carboxyl groups determined by potentiometric titration of 1 g of a semi-aromatic polyamide resin dissolved in 35 ml of o-cresol under heating, to which solution 20 ml of benzyl alcohol and 250 μl of formaldehyde were added after cooling, using a 0.1 N methanolic solution of KOH, wherein the ratio of terminal groups of molecular chains of the semi-aromatic polyamide resin that are blocked with a terminal-blocking agent is determined according to the following formula: A - B / A × 100 % wherein A represents the total number of terminal groups of the molecular chains, and B represents the total number of the terminal carboxyl groups and the terminal amino groups, wherein the number of each of the terminal carboxyl groups, the terminal amino groups and the blocked terminal groups for determining the terminal blocking ratio according to the above formula are determined by 1 H-NMR analysis at 500 MHz in deuterated trifluoroacetic acid at 50°C on the basis of the integrated values of the characteristic signals corresponding to the respective terminal groups. dicarboxylic acid units in which 50 to 100 mol% of the dicarboxylic acid units are aromatic dicarboxylic acid units; and diamine units in which 60 to 100 mol% of the diamine units are aliphatic diamine units having 9 to 13 carbon atoms, wherein at least 10% of terminal groups of molecular chains of the semi-aromatic polyamide resin are blocked with a terminal-blocking agent, wherein an amount of terminal amino groups of the molecular chains is 60 μeq/g or more and 120 μeq/g or less, and wherein the following inequality is satisfied: NH 2 / COOH ≥ 6 where [NH 2] (μeq/g) represents the amount of the terminal amino groups determined by titration of a sample solution of 1 g of a semi-aromatic polyamide resin dissolved in 35 ml of phenol, to which 2 ml of methanol was added, using 0.01 N aqueous hydrochloric acid with thymol blue as an indicator, and [COOH] (μeq/g) represents an amount of terminal carboxyl groups determined by potentiometric titration of 1 g of a semi-aromatic polyamide resin dissolved in 35 ml of o-cresol under heating, to which solution 20 ml of benzyl alcohol and 250 μl of formaldehyde were added after cooling, using a 0.1 N methanolic solution of KOH, wherein the ratio of terminal groups of molecular chains of the semi-aromatic polyamide resin that are blocked with a terminal-blocking agent is determined according to the following formula: A - B / A × 100 % wherein A represents the total number of terminal groups of the molecular chains, and B represents the total number of the terminal carboxyl groups and the terminal amino groups, wherein the number of each of the terminal carboxyl groups, the terminal amino groups and the blocked terminal groups for determining the terminal blocking ratio according to the above formula are determined by 1 H-NMR analysis at 500 MHz in deuterated trifluoroacetic acid at 50°C on the basis of the integrated values of the characteristic signals corresponding to the respective terminal groups.