The "female wing in-charge of the Neo JMB," Humayra alias Nabila, has been released from the Kashempur Central Jail.
She walked free around 5pm on Wednesday, a day after she secured bail from a Dhaka court.
Kashempur Central Jail (female) Super Mohammad Shajahan confirmed the news.
She was arrested for allegedly financing a plan to carry out an attack on the crowd paying homage to Bangabandhu on National Mourning Day at Dhanmondi 32 in the capital.
She was picked up from the capital’s Siddheshwari area in April.
Earlier on August 15 last year, a suspected suicide bomber of the Neo JMB was killed during an anti-militancy operation at Hotel Olio International in the city's Panthapath area.
Law enforcers said the suicide bomber had planned to carry out an attack on the crowd paying homage to Bangabandhu.